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1. Excitonic nature of magnons in a quantum Hall ferromagnet

Author: A. Assouline, M. Jo, P. Brasseur, K. Watanabe, T. Taniguchi, Th. Jolicoeur, D. C. Glattli, N. Kumada, P. Roche, F. D. Parmentier, and P. Roulleau
Subjects: 0103 physical sciences, General Physics and Astronomy, 02 engineering and technology, 021001 nanoscience & nanotechnology, 010306 general physics, 0210 nano-technology, 01 natural sciences
Published: 2021
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2. Quantum Hall valley splitters and tunable Mach-Zehnder interferometer in graphene

Author: Norio Kumada, Heung-Sun Sim, Kazuyuki Watanabe, Mihee Jo, T. Taniguchi, Geneviève Fleury, Alexandre Assouline, François Parmentier, D. C. Glattli, W. Dumnernpanich, Patrice Roche, P. Brasseur, Preden Roulleau, Groupe Nano-Electronique (GNE), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Groupe Modélisation et Théorie (GMT), Korea Advanced Institute of Science and Technology (KAIST), National Institute for Materials Science (NIMS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), NTT Basic Research Laboratories [Tokio], and NTT Basic Research Laboratories
Subjects: Quantum optics, Physics, [PHYS]Physics [physics], Quantum decoherence, Condensed Matter - Mesoscale and Nanoscale Physics, business.industry, Graphene, General Physics and Astronomy, Physics::Optics, FOS: Physical sciences, Quantum Hall effect, Mach–Zehnder interferometer, 01 natural sciences, law.invention, Interferometry, law, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Astronomical interferometer, Optoelectronics, [PHYS.COND]Physics [physics]/Condensed Matter [cond-mat], 010306 general physics, business, ComputingMilieux_MISCELLANEOUS, Beam splitter
Abstract: International audience; Graphene is a very promising test bed for the field of electron quantum optics. However, a fully tunable and coherent electronic beam splitter is still missing. We report the demonstration of electronic beam splitters in graphene that couple quantum Hall edge channels having opposite valley polarizations. The electronic transmission of our beam splitters can be tuned from zero to near unity. By independently setting the beam splitters at the two corners of a graphene p−n junction to intermediate transmissions, we realize a fully tunable electronic Mach-Zehnder interferometer. This tunability allows us to unambiguously identify the quantum interferences due to the Mach-Zehnder interferometer, and to study their dependence with the beam-splitter transmission and the interferometer bias voltage. The comparison with conventional semiconductor interferometers points toward universal processes driving the quantum decoherence in those two different 2D systems, with graphene being much more robust to their effect.
Published: 2020
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3. A Josephson relation for fractionally charged anyons

Author: M. Santin, M. Kapfer, Ian Farrer, David A. Ritchie, Preden Roulleau, D. C. Glattli, Kapfer, M [0000-0002-1017-2602], Farrer, I [0000-0002-3033-4306], Ritchie, DA [0000-0002-9844-8350], Glattli, DC [0000-0002-1457-0915], and Apollo - University of Cambridge Repository
Subjects: Physics, Multidisciplinary, Shot noise, Anyon, Charge (physics), 02 engineering and technology, Electron, Quantum phases, 021001 nanoscience & nanotechnology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 01 natural sciences, Topological quantum computer, Quantum mechanics, 0103 physical sciences, Fractional quantum Hall effect, 0202 Atomic, Molecular, Nuclear, Particle and Plasma Physics, Quantum information, 010306 general physics, 0210 nano-technology, 0206 Quantum Physics
Abstract: Probing the dynamics of anyons A two-dimensional electron gas in the fractional quantum Hall regime has unusual excitations called anyons that carry only a fraction of the electron's charge. This fractional charge can be observed through a dynamical response to irradiation by microwaves, but such experiments require a combination of high magnetic fields with sensitive noise measurements and very low temperatures. Kapfer et al. observed this dynamical response in a GaAs/AlGaAs heterostructure hosting a high-mobility two-dimensional electron gas with fractional excitations of one-third and one-fifth of the electron's charge. The method may be of interest for use in topological quantum computing. Science , this issue p. 846
Published: 2019
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4. Hanbury-Brown Twiss noise correlation with time controlled quasi-particles in ballistic quantum conductors

Author: Preden Roulleau and D. C. Glattli
Subjects: Physics, Dephasing, Quantum noise, Shot noise, Hanbury Brown and Twiss effect, Charge (physics), 02 engineering and technology, Electron, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, 0103 physical sciences, Atomic physics, 010306 general physics, 0210 nano-technology, Wave function, Quantum
Abstract: We study the Hanbury Brown and Twiss correlation of electronic quasi-particles injected in a quantum conductor using current noise correlations and we experimentally address the effect of finite temperature. By controlling the relative time of injection of two streams of electrons it is possible to probe the fermionic antibunching, performing the electron analog of the optical Hong Ou Mandel (HOM) experiment. The electrons are injected using voltage pulses with either sine-wave or Lorentzian shape. In the latter case, we propose a set of orthogonal wavefunctions, describing periodic trains of multiply charged electron pulses, which give a simple interpretation to the HOM shot noise. The effect of temperature is then discussed and experimentally investigated. We observe a perfect electron anti-bunching for a large range of temperature, showing that, as recently predicted, thermal mixing of the states does not affect anti-bunching properties, a feature qualitatively different from dephasing. For single charge Lorentzian pulses, we provide experimental evidence of the prediction that the HOM shot noise variation versus the emission time delay is remarkably independent of the temperature.
Published: 2016
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5. Strongly Correlated Charge Transport in Silicon Metal-Oxide-Semiconductor Field-Effect Transistor Quantum Dots

Author: Xavier Jehl, Preden Roulleau, Minky Seo, Patrice Roche, François Parmentier, D. C. Glattli, S. Barraud, Louis Hutin, Marc Sanquer, Groupe Nano-Electronique (GNE), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de Transport Electronique Quantique et Supraconductivité (LaTEQS), PHotonique, ELectronique et Ingénierie QuantiqueS (PHELIQS), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information (CEA-LETI), Direction de Recherche Technologique (CEA) (DRT (CEA)), and European Project: 679531,H2020,ERC-2015-STG,COHEGRAPH(2016)
Subjects: Physics, [PHYS]Physics [physics], Condensed matter physics, Silicon, Transistor, Shot noise, General Physics and Astronomy, chemistry.chemical_element, Charge (physics), 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 01 natural sciences, law.invention, chemistry, Quantum dot, law, 0103 physical sciences, Quasiparticle, Field-effect transistor, 010306 general physics, 0210 nano-technology, Quantum
Abstract: International audience; Quantum shot noise probes the dynamics of charge transfers through a quantum conductor, reflecting whether quasiparticles flow across the conductor in a steady stream, or in syncopated bursts. We have performed high-sensitivity shot noise measurements in a quantum dot obtained in a silicon metal-oxide-semiconductor field-effect transistor. The quality of our device allows us to precisely associate the different transport regimes and their statistics with the internal state of the quantum dot. In particular, we report on large current fluctuations in the inelastic cotunneling regime, corresponding to different highly correlated, non-Markovian charge transfer processes. We have also observed unusually large current fluctuations at low energy in the elastic cotunneling regime, the origin of which remains to be fully investigated.
Published: 2018
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6. Pseudorandom binary injection of levitons for electron quantum optics

Author: P. Roulleau, D. C. Glattli, Groupe Nano-Electronique (GNE), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, ANR-16-CE30-0015,FullyQuantum,Manipulation tout-quantique de pulses de charges entières et non-entières dans des fils quantiques(2016), and European Project: 680875,H2020,ERC-2015-PoC,C-Levitonics(2015)
Subjects: Floquet theory, Physics, Quantum optics, [PHYS]Physics [physics], Condensed Matter - Mesoscale and Nanoscale Physics, Shot noise, FOS: Physical sciences, 02 engineering and technology, Electron, 021001 nanoscience & nanotechnology, 01 natural sciences, Qubit, Quantum mechanics, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Scattering theory, Leviton, PACS numbers: 73.23.-b,73.50.Td,42.50.-p,42.50.Ar, 010306 general physics, 0210 nano-technology, Coherence (physics)
Abstract: The recent realization of single electron sources let us envision performing electron quantum optics experiments, where electrons can be viewed as flying qubits propagating in a ballistic conductor. To date, all electron sources operate in a periodic electron injection mode leading to energy spectrum singularities in various physical observables which sometimes hide the bare nature of physical effects. To go beyond this, we propose a spread-spectrum approach where electron flying qubits are injected in a non-periodic manner following a pseudorandom binary bit pattern. Extending the Floquet scattering theory approach from periodic to spread-spectrum drive, the shot noise of pseudorandom binary sequences of single electron injection can be calculated for leviton and non-leviton sources. Our new approach allows us to disentangle the physics of the manipulated excitations from that of the injection protocol. In particular, the spread spectrum approach is shown to provide a better knowledge of electronic Hong Ou Mandel correlations and to clarify the nature of the pulse train coherence and the role of the dynamical orthogonality catastrophe for non-integer charge injection., Comment: 11 pages and 5 figures including 3 new figures, results on quantum coherence and explicit formulae added
Published: 2018
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7. Quantum Hall effect in epitaxial graphene with permanent magnets

Author: T. Cazimajou, Hiroshi Irie, Preden Roulleau, Norio Kumada, Hiroki Hibino, D. C. Glattli, François Parmentier, Yoshiaki Sekine, Groupe Nano-Electronique (GNE), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, NTT Basic Research Laboratories [Tokio], NTT Basic Research Laboratories, the CEA (Projet phare ZeroPOVA), ANR-11-NANO-0004,metrograph,Metrology de l'Effet Hall Quantique dans le graphène(2011), and European Project: 228273,EC:FP7:ERC,ERC-2008-AdG,MEQUANO(2009)
Subjects: Materials science, FOS: Physical sciences, 02 engineering and technology, Superconducting magnet, Quantum Hall effect, 7. Clean energy, 01 natural sciences, Article, law.invention, chemistry.chemical_compound, Condensed Matter::Materials Science, law, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Silicon carbide, 010306 general physics, Superconductivity, [PHYS]Physics [physics], Multidisciplinary, Condensed matter physics, Condensed Matter - Mesoscale and Nanoscale Physics, Graphene, Landau quantization, 021001 nanoscience & nanotechnology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Neodymium magnet, chemistry, Magnet, 0210 nano-technology
Abstract: We have observed the well-kown quantum Hall effect (QHE) in epitaxial graphene grown on silicon carbide (SiC) by using, for the first time, only commercial NdFeB permanent magnets at low temperature. The relatively large and homogeneous magnetic field generated by the magnets, together with the high quality of the epitaxial graphene films, enables the formation of well-developed quantum Hall states at Landau level filling factors $\nu=\pm 2$, commonly observed with superconducting electro-magnets. Furthermore, the chirality of the QHE edge channels can be changed by a top gate. These results demonstrate that basic QHE physics are experimentally accessible in graphene for a fraction of the price of conventional setups using superconducting magnets, which greatly increases the potential of the QHE in graphene for research and applications., Comment: 9 pages, 3 figures
Published: 2016
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8. Photon-Assisted Shot Noise in Graphene in the Terahertz Range

Author: L. N. Serkovic-Loli, Preden Roulleau, D. C. Glattli, François Parmentier, Groupe Nano-Electronique (GNE), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CEA (Projet phare ZeroPOVA), ANR-11-NANO-0004,metrograph,Metrology de l'Effet Hall Quantique dans le graphène(2011), and European Project: 228273,EC:FP7:ERC,ERC-2008-AdG,MEQUANO(2009)
Subjects: Photon, Terahertz radiation, FOS: Physical sciences, General Physics and Astronomy, Physics::Optics, 02 engineering and technology, 01 natural sciences, Electromagnetic radiation, Optics, Noise generator, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, 010306 general physics, Physics, Laser ultrasonics, [PHYS]Physics [physics], Condensed Matter - Mesoscale and Nanoscale Physics, Condensed matter physics, business.industry, Quantum noise, Shot noise, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, Burst noise, 0210 nano-technology, business
Abstract: When subjected to electromagnetic radiation, the fluctuation of the electronic current across a quantum conductor increases. This additional noise, called photon-assisted shot noise, arises from the generation and subsequent partition of electron-hole pairs in the conductor. The physics of photon-assisted shot noise has been thoroughly investigated at microwave frequencies up to 20 GHz, and its robustness suggests that it could be extended to the Terahertz (THz) range. Here, we present measurements of the quantum shot noise generated in a graphene nanoribbon subjected to a THz radiation. Our results show signatures of photon-assisted shot noise, further demonstrating that hallmark time-dependant quantum transport phenomena can be transposed to the THz range., includes supplemental material
Published: 2016
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9. Shot noise generated by graphene p-n junctions in the quantum Hall effect regime

Author: Norio Kumada, D. C. Glattli, Hiroki Hibino, François Parmentier, Preden Roulleau, NTT BRL, NTT Corporation (NTT, BRL), NTT, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Groupe Nano-Electronique (GNE), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, ANR-11-NANO-0004,metrograph,Metrology de l'Effet Hall Quantique dans le graphène(2011), and European Project: 228273,EC:FP7:ERC,ERC-2008-AdG,MEQUANO(2009)
Subjects: General Physics and Astronomy, FOS: Physical sciences, 02 engineering and technology, Electron, Quantum Hall effect, 01 natural sciences, Noise (electronics), General Biochemistry, Genetics and Molecular Biology, Article, law.invention, Condensed Matter - Strongly Correlated Electrons, symbols.namesake, law, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 010306 general physics, Physics, Quantum optics, [PHYS]Physics [physics], Mesoscopic physics, Multidisciplinary, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed matter physics, Strongly Correlated Electrons (cond-mat.str-el), Graphene, Shot noise, General Chemistry, 021001 nanoscience & nanotechnology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Dirac fermion, symbols, 0210 nano-technology
Abstract: Graphene offers a unique system to investigate transport of Dirac Fermions at p–n junctions. In a magnetic field, combination of quantum Hall physics and the characteristic transport across p–n junctions leads to a fractionally quantized conductance associated with the mixing of electron-like and hole-like modes and their subsequent partitioning. The mixing and partitioning suggest that a p–n junction could be used as an electronic beam splitter. Here we report the shot noise study of the mode-mixing process and demonstrate the crucial role of the p–n junction length. For short p–n junctions, the amplitude of the noise is consistent with an electronic beam-splitter behaviour, whereas, for longer p–n junctions, it is reduced by the energy relaxation. Remarkably, the relaxation length is much larger than typical size of mesoscopic devices, encouraging using graphene for electron quantum optics and quantum information processing., Dirac fermions at a p–n junction can exhibit a wide variety of unusual properties. Here, the authors investigate the dynamics of such fermions in a graphene junction using shot noise measurements and demonstrate the crucial role of junction length.
Published: 2016
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10. Four-terminal measurements of SWNTs using MWNTs as voltage electrodes

Author: Bo Gao, Yng-Gwei Chen, D. C. Glattli, Adrian Bachtold, and Michael S. Fuhrer
Subjects: Electron mobility, Materials science, Condensed matter physics, business.industry, Coulomb blockade, Carbon nanotube, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Condensed Matter Physics, 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, Electronic, Optical and Magnetic Materials, law.invention, Quantum dot, law, Electrical resistivity and conductivity, 0103 physical sciences, Electrode, Optoelectronics, 010306 general physics, business, Voltage drop, Voltage
Abstract: We report on electron transport measurements of single-wall carbon nanotubes in a four-terminal configuration with noninvasive voltage electrodes. The voltage drop is detected using multiwalled carbon nanotubes while the current is injected through nanofabricated Au electrodes. Measurements are carried at high temperature so that the four-terminal resistance directly gives the intrinsic resistance. The resistance is shown to result from weak disorder and from quantum interference effect corrections. In addition, we present Coulomb blockade measurements. The length of the quantum dot that is determined from the level spacing equals the separation between the Au electrodes.
Published: 2006
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11. Quantum tomography of an electron

Author: D. C. Glattli, T. Jullien, Antonella Cavanna, B. Roche, Yong Jin, Preden Roulleau, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Groupe Nano-Electronique (GNE), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), and European Project: 228273,EC:FP7:ERC,ERC-2008-AdG,MEQUANO(2009)
Subjects: Physics, [PHYS]Physics [physics], Multidisciplinary, Quantum sensor, Quantum simulator, 02 engineering and technology, Quantum tomography, Quantum imaging, 021001 nanoscience & nanotechnology, 01 natural sciences, Open quantum system, Quantum error correction, Quantum mechanics, Quantum electrodynamics, Quantum process, 0103 physical sciences, Quantum information, 010306 general physics, 0210 nano-technology
Abstract: International audience; The complete knowledge of a quantum state allows the prediction of the probability of all possible measurement outcomes, a crucial step in quantum mechanics. It can be provided by tomographic methods which have been applied to atomic, molecular, spin and photonic states. For optical or microwave photons, standard tomogra-phy is obtained by mixing the unknown state with a large-amplitude coherent photon field. However, for fermions such as electrons in condensed matter, this approach is not applicable because fermionic fields are limited to small amplitudes (at most one particle per state), and so far no determination of an electron wavefunction has been made. Recent proposals involving quantum conductors suggest that the wavefunction can be obtained by measuring the time-dependent current of electronic wave interferometers or the current noise of electronic Hanbury-Brown/Twiss interferometers. Here we show that such measurements are possible despite the extreme noise sensitivity required, and present the reconstructed wavefunction quasi-probability, or Wigner distribution function, of single electrons injected into a ballistic conductor. Many identical electrons are prepared in well-controlled quantum states called levitons by repeatedly applying Lorentzian voltage pulses to a contact on the conductor. After passing through an electron beam splitter, the levitons are mixed with a weak-amplitude fermionic field formed by a coherent superposition of electron–hole pairs generated by a small alternating current with a frequency that is a multiple of the voltage pulse frequency 16. Antibunching of the electrons and holes with the levi-tons at the beam splitter changes the leviton partition statistics, and the noise variations provide the energy density matrix elements of the levitons. This demonstration of quantum tomography makes the developing field of electron quantum optics with ballistic conductors a new test-bed for quantum information with fermions. These results may find direct application in probing the entanglement of electron flying quantum bits, electron decoherence and electron interactions. They could also be applied to cold fermionic (or spin-1/2) atoms.
Published: 2014
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12. Fractionalization of minimal excitations in integer quantum Hall edge channels

Author: Preden Roulleau, D. C. Glattli, J. Dubois, Pascal Degiovanni, Charles Grenier, T. Jullien, Centre de Physique Théorique [Palaiseau] (CPHT), École polytechnique (X)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de l'ENS Lyon (Phys-ENS), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-École polytechnique (X), École normale supérieure - Lyon (ENS Lyon)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon
Subjects: Floquet theory, Bosonization, FOS: Physical sciences, 02 engineering and technology, Electron, Quantum Hall effect, 01 natural sciences, Quantum mechanics, quantum coherence, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, electron quantum optics, 010306 general physics, quantum transport, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Scattering, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 3. Good health, Electronic, Optical and Magnetic Materials, Pair production, 73.23-b,73.43.-f,71.10.Pm, 73.43.Lp, Quantum electrodynamics, Quasiparticle, quantum Hall e ffect, 0210 nano-technology, Coherence (physics)
Abstract: A theoretical study of the single electron coherence properties of Lorentzian and rectangular pulses is presented. By combining bosonization and the Floquet scattering approach, the effect of interactions on a periodic source of voltage pulses is computed exactly. When such excitations are injected into one of the channels of a system of two copropagating quantum Hall edge channels, they fractionalize into pulses whose charge and shape reflects the properties of interactions. We show that the dependence of fractionalization induced electron/hole pair production in the pulses amplitude contains clear signatures of the fractionalization of the individual excitations. We propose an experimental setup combining a source of Lorentzian pulses and an Hanbury Brown and Twiss interferometer to measure interaction induced electron/hole pair production and more generally to reconstruct single electron coherence of these excitations before and after their fractionalization., 18 pages, 10 figures, 1 table
Published: 2013
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13. Carrier drift velocity and edge magnetoplasmons in graphene

Author: Patrice Roche, Keyan Bennaceur, Ivana Petkovic, D. C. Glattli, F. I. B. Williams, Fabien Portier, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire National de Métrologie et d'Essais [Trappes] (LNE ), Research Institute for Solid State Physics and Optics [Budapest], Wigner Research Centre for Physics [Budapest], Hungarian Academy of Sciences (MTA)-Hungarian Academy of Sciences (MTA), MEQUANO (228273), and European Project: 228273,EC:FP7:ERC,ERC-2008-AdG,MEQUANO(2009)
Subjects: Physics, Drift velocity, Characteristic length, Condensed matter physics, Condensed Matter - Mesoscale and Nanoscale Physics, Graphene, Wave packet, General Physics and Astronomy, FOS: Physical sciences, Fermi energy, Edge (geometry), Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 01 natural sciences, 010305 fluids & plasmas, law.invention, law, Picosecond, [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Quasiparticle, 010306 general physics
Abstract: We investigate electron dynamics at the graphene edge by studying the propagation of collective edge magnetoplasmon (EMP) excitations. By timing the travel of narrow wave-packets on picosecond time scales around exfoliated samples, we find chiral propagation with low attenuation at a velocity which is quantized on Hall plateaus. We extract the carrier drift contribution from the EMP propagation and find it to be slightly less than the Fermi velocity, as expected for an abrupt edge. We also extract the characteristic length for Coulomb interaction at the edge and find it to be smaller than for soft, depletion edge systems., Comment: 5 pages, 3 figures of main text and 6 pages, 6 figures of supplemental material
Published: 2013
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14. Minimal-excitation states for electron quantum optics using levitons

Author: T. Jullien, Antonella Cavanna, Preden Roulleau, Werner Wegscheider, J. Dubois, Fabien Portier, Yong Jin, Patrice Roche, D. C. Glattli, Groupe Nano-Electronique (GNE), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Solid State Physics Laboratory, Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), and European Project: 228273,EC:FP7:ERC,ERC-2008-AdG,MEQUANO(2009)
Subjects: Physics, Quantum optics, [PHYS]Physics [physics], Multidisciplinary, Fermi energy, 02 engineering and technology, Electron, Quantum Hall effect, 021001 nanoscience & nanotechnology, 01 natural sciences, Quantum technology, Quantum dot, Quantum mechanics, 0103 physical sciences, Quasiparticle, Quantum information, 010306 general physics, 0210 nano-technology
Abstract: International audience; The on-demand generation of pure quantum excitations is important for the operation of quantum systems, but it is particularly difficult for a system of fermions. This is because any perturbation affects all states below the Fermi energy, resulting in a complex superposition of particle and hole excitations. However, it was predicted nearly 20 years ago1, 2, 3 that a Lorentzian time-dependent potential with quantized flux generates a minimal excitation with only one particle and no hole. Here we report that such quasiparticles (hereafter termed levitons) can be generated on demand in a conductor by applying voltage pulses to a contact. Partitioning the excitations with an electronic beam splitter generates a current noise that we use to measure their number. Minimal-excitation states are observed for Lorentzian pulses, whereas for other pulse shapes there are significant contributions from holes. Further identification of levitons is provided in the energy domain with shot-noise spectroscopy, and in the time domain with electronic Hong–Ou–Mandel noise correlations4, 5, 6, 7, 8. The latter, obtained by colliding synchronized levitons on a beam splitter, exemplifies the potential use of levitons for quantum information: using linear electron quantum optics9 in ballistic conductors, it is possible to imagine flying-qubit10, 11 operation in which the Fermi statistics are exploited12, 13, 14 to entangle synchronized electrons emitted by distinct sources15, 16, 17, 18. Compared with electron sources based on quantum dots19, 20, 21, the generation of levitons does not require delicate nanolithography, considerably simplifying the circuitry for scalability. Levitons are not limited to carrying a single charge, and so in a broader context n-particle levitons could find application in the study of full electron counting statistics22, 23, 24, 25. But they can also carry a fraction of charge if they are implemented in Luttinger liquids3 or in fractional quantum Hall edge channels26; this allows the study of Abelian and non-Abelian quasiparticles in the time domain. Finally, the generation technique could be applied to cold atomic gases27, 28, leading to the possibility of atomic levitons.
Published: 2013
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15. Electron quantum optics: partitioning electrons one by one

Author: Gwendal Fève, Jean-Marc Berroir, D. C. Glattli, Antonella Cavanna, Charles Grenier, Pascal Degiovanni, Bernard Plaçais, François Parmentier, Yong Jin, Erwann Bocquillon, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique de l'ENS Lyon (Phys-ENS), École normale supérieure de Lyon (ENS de Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Lyon (ENS Lyon)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, and Berroir, Jean-Marc
Subjects: Wave packet, General Physics and Astronomy, FOS: Physical sciences, 02 engineering and technology, Electron, 7. Clean energy, 01 natural sciences, law.invention, law, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 010306 general physics, ComputingMilieux_MISCELLANEOUS, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Common emitter, Quantum optics, Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Hanbury Brown and Twiss effect, 021001 nanoscience & nanotechnology, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Splitter, Atomic physics, 0210 nano-technology, Beam splitter, Fermi Gamma-ray Space Telescope
Abstract: We have realized a quantum optics like Hanbury Brown and Twiss (HBT) experiment by partitioning, on an electronic beam-splitter, single elementary electronic excitations produced one by one by an on-demand emitter. We show that the measurement of the output currents correlations in the HBT geometry provides a direct counting, at the single charge level, of the elementary excitations (electron/hole pairs) generated by the emitter at each cycle. We observe the antibunching of low energy excitations emitted by the source with thermal excitations of the Fermi sea already present in the input leads of the splitter, which suppresses their contribution to the partition noise. This effect is used to probe the energy distribution of the emitted wave-packets., 5 pages, 4 figures
Published: 2012

16. Current noise spectrum of a single-particle emitter: Theory and experiment

Author: Mathias Albert, François Parmentier, Jean-Marc Berroir, Markus Büttiker, Christian Flindt, Gwendal Fève, D. C. Glattli, Erwann Bocquillon, Bernard Plaçais, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Département de Physique Théorique, Université de Genève = University of Geneva (UNIGE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), University of Geneva [Switzerland], and Berroir, Jean-Marc
Subjects: Floquet theory, Physics, Mesoscopic physics, Condensed Matter - Mesoscale and Nanoscale Physics, Wave packet, FOS: Physical sciences, Semiclassical physics, 02 engineering and technology, Quantum Hall effect, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Noise (electronics), Electronic, Optical and Magnetic Materials, Computational physics, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Quantum mechanics, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Scattering theory, 010306 general physics, 0210 nano-technology, ComputingMilieux_MISCELLANEOUS, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Common emitter
Abstract: The controlled and accurate emission of coherent electronic wave packets is of prime importance for future applications of nano-scale electronics. Here we present a theoretical and experimental analysis of the finite-frequency noise spectrum of a periodically driven single electron emitter. The electron source consists of a mesoscopic capacitor that emits single electrons and holes into a chiral edge state of a quantum Hall sample. We compare experimental results with two complementary theoretical descriptions: On one hand, the Floquet scattering theory which leads to accurate numerical results for the noise spectrum under all relevant operating conditions. On the other hand, a semi-classical model which enables us to develop an analytic description of the main sources of noise when the emitter is operated under optimal conditions. We find excellent agreement between experiment and theory. Importantly, the noise spectrum provides us with an accurate description and characterization of the mesoscopic capacitor when operated as a periodic single electron emitter., Comment: 17 pages, 15 figures
Published: 2012

17. Noise of a single electron emitter: experiment

Author: François Parmentier, Antonella Cavanna, Jean-Marc Berroir, Gwendal Fève, D. C. Glattli, Bernard Plaçais, Yong Jin, Adrien Mahé, E. Bocquillon, Berroir, Jean-Marc, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Mesoscopic physics, Noise measurement, Astrophysics::High Energy Astrophysical Phenomena, Electron, 01 natural sciences, Noise (electronics), 010305 fluids & plasmas, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Quantum dot, Quantum mechanics, 0103 physical sciences, Physics::Accelerator Physics, Atomic physics, 010306 general physics, Quantum tunnelling, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], ComputingMilieux_MISCELLANEOUS, Common emitter, Electron gun
Abstract: We present here the experimental study of the short time correlations of the current fluctuations generated by a periodic single electron emitter. The electron emitter is a mesoscopic capacitor, a top gated quantum dot connected to a conductor via a tunable tunnel barrier. We observe a new fundamental noise for electrons which is associated with the quantum fluctuations of the electron emission time from one emission cycle to the other. This random jitter between the emission trigger and the single particle emission is related to the random nature of single particle tunneling and is intrinsic to any single particle emitter. When the emitter emits a single particle at each cycle with unit probability, the noise reduces to this fundamental jitter limit which demonstrates single particle emission.
Published: 2011

18. Conserved spin and orbital phase along carbon nanotubes connected with multiple ferromagnetic contacts

Author: Jean-Marc Berroir, Audrey Cottet, Bernard Plaçais, Takis Kontos, Pascal Morfin, Thomas Delattre, Cheryl Feuillet-Palma, Gwendal Fève, D. C. Glattli, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: FOS: Physical sciences, 02 engineering and technology, Carbon nanotube, 01 natural sciences, 7. Clean energy, law.invention, Condensed Matter::Materials Science, law, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 010306 general physics, Spin (physics), [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Physics, Spintronics, Condensed matter physics, Spin polarization, Condensed Matter - Mesoscale and Nanoscale Physics, Spin engineering, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Electronic, Optical and Magnetic Materials, Spin Hall effect, Spinplasmonics, Condensed Matter::Strongly Correlated Electrons, Quantum spin liquid, 0210 nano-technology
Abstract: We report on spin dependent transport measurements in carbon nanotubes based multi-terminal circuits. We observe a gate-controlled spin signal in non-local voltages and an anomalous conductance spin signal, which reveal that both the spin and the orbital phase can be conserved along carbon nanotubes with multiple ferromagnetic contacts. This paves the way for spintronics devices exploiting both these quantum mechanical degrees of freedom on the same footing., 8 pages - minor differences with published version
Published: 2010
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19. Unveiling quantum Hall transport by Efros-Shklovskii to Mott variable range hopping transition with Graphene

Author: D. C. Glattli, Patrice Roche, Fabien Portier, Patrice Jacques, Keyan Bennaceur, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Groupe Nano-Electronique (GNE), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Institut Rayonnement Matière de Saclay (IRAMIS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, MEQUANO (228273), and European Project: 228273,EC:FP7:ERC,ERC-2008-AdG,MEQUANO(2009)
Subjects: FOS: Physical sciences, 02 engineering and technology, Electron, Quantum Hall effect, 01 natural sciences, Variable-range hopping, law.invention, symbols.namesake, Quantum spin Hall effect, [PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph], law, Quantum mechanics, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 010306 general physics, PACS number(s): 73.43.−f, 71.30.+h, 72.20.My, Physics, Quantum Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed matter physics, Graphene, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Electronic, Optical and Magnetic Materials, Dirac equation, [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], symbols, Conductance quantum, 0210 nano-technology, Fermi gas, Quantum Physics (quant-ph)
Abstract: International audience; The quantum Hall effect is universal and expected to occur in all two-dimensional electron systems in perpendicular high-magnetic field. We revisit quantum localization thanks to the high-energy scale of the quantum Hall effect in graphene, where the electron dynamics obey the Dirac equation. We solve a long debated question on the nature of electron transport in the transition region between Hall resistance plateaus. Is it of metallic or of variable-range hopping type as proposed, respectively, by Pruisken and Polyakov-Shklovskii? To the best of our knowledge, no experiment was able to discriminate between these models. Here, measurements of the conductance peak width scaling exponents with both temperature and current and determination of the localization length validates the variable-range hopping scenario. This shows that the usual assumption of a metallic behavior of the two-dimensional electron gas (2DEG) between Hall resistance plateaus is unnecessary for macroscopic samples.
Published: 2010
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20. Current correlations of an on-demand single-electron emitter

Author: Yong Jin, Adrien Mahé, Gwendal Fève, D. C. Glattli, Takis Kontos, Jean-Marc Berroir, Erwann Bocquillon, Bernard Plaçais, François Parmentier, Antonella Cavanna, Berroir, Jean-Marc, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quantum optics, Physics, Quantum limit, Quantum sensor, Quantum noise, 02 engineering and technology, Quantum imaging, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Electronic, Optical and Magnetic Materials, Computational physics, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Quantum amplifier, Open quantum system, Quantum mechanics, 0103 physical sciences, 010306 general physics, 0210 nano-technology, Quantum dissipation, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], ComputingMilieux_MISCELLANEOUS
Abstract: In analogy with quantum optics, short-time correlations of the current fluctuations are measured and used to assess the quality of the single-particle emission of a recently introduced on-demand electron source. We observe, in the context of electronics, the fundamental noise limit associated with the quantum fluctuations of the emission time of single particles, or quantum jittering. In optimum operating conditions of the source, the noise reduces to the quantum jitter limit, which demonstrates single-particle emission. Combined with the coherent manipulations of single electrons in a quantum conductor, this electron quantum optics experiment opens the way to explore new problems including quantum statistics and interactions at the single-electron level.
Published: 2010

21. Noisy Kondo impurities

Author: Cheryl Feuillet-Palma, Jean-Marc Berroir, Thomas Delattre, Takis Kontos, L. G. Herrmann, Christophe Mora, Gwendal Fève, Pascal Morfin, Bernard Plaçais, D. C. Glattli, Mahn Soo Choi, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Physics Department, Pohang University of Science and Technology (POSTECH), Berroir, Jean-Marc, Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: General Physics and Astronomy, FOS: Physical sciences, 02 engineering and technology, 01 natural sciences, Condensed Matter - Strongly Correlated Electrons, Impurity, Quantum mechanics, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Mathematics::Metric Geometry, 010306 general physics, Anderson impurity model, ComputingMilieux_MISCELLANEOUS, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Physics, Condensed matter physics, Condensed Matter - Mesoscale and Nanoscale Physics, Strongly Correlated Electrons (cond-mat.str-el), Kondo insulator, 021001 nanoscience & nanotechnology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Quantum dot, Condensed Matter::Strongly Correlated Electrons, Kondo effect, Current (fluid), 0210 nano-technology
Abstract: The anti-ferromagnetic coupling of a magnetic impurity carrying a spin with the conduction electrons spins of a host metal is the basic mechanism responsible for the increase of the resistance of an alloy such as Cu${}_{0.998}$Fe${}_{0.002}$ at low temperature, as originally suggested by Kondo . This coupling has emerged as a very generic property of localized electronic states coupled to a continuum . The possibility to design artificial controllable magnetic impurities in nanoscopic conductors has opened a path to study this many body phenomenon in unusual situations as compared to the initial one and, in particular, in out of equilibrium situations. So far, measurements have focused on the average current. Here, we report on \textit{current fluctuations} (noise) measurements in artificial Kondo impurities made in carbon nanotube devices. We find a striking enhancement of the current noise within the Kondo resonance, in contradiction with simple non-interacting theories. Our findings provide a test bench for one of the most important many-body theories of condensed matter in out of equilibrium situations and shed light on the noise properties of highly conductive molecular devices., Comment: minor differences with published version
Published: 2010
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22. Experimental determination of the statistics of photons emitted by a tunnel junction

Author: Eva Zakka-Bajjani, J. Dufouleur, D. C. Glattli, Patrice Roche, Fabien Portier, N. Coulombel, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), CNanoIdF-QPCSinPS, Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Photon, Condensed Matter - Mesoscale and Nanoscale Physics, Cross-correlation, Chaotic, Hanbury Brown and Twiss effect, FOS: Physical sciences, General Physics and Astronomy, 02 engineering and technology, Electron, 021001 nanoscience & nanotechnology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 01 natural sciences, Tunnel junction, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Statistics, Atomic physics, 010306 general physics, 0210 nano-technology, Microwave, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Voltage
Abstract: We report on a microwave Hanbury-Brown Twiss experiment probing the statistics of GHz photons emitted by a tunnel junction in the shot noise regime at low temperature. By measuring the crosscorrelated fluctuations of the occupation numbers of the photon modes of both detection branches we show that, while the statistics of electrons is Poissonian, the photons obey chaotic statistics. This is observed even for low photon occupation number when the voltage across the junction is close to $h\nu/e$., Comment: Submitted to Phys.Rev.Lett
Published: 2009

23. Realization of a time-controlled sub nanosecond single electron source for ballistic qubits

Author: Bernard Plaçais, Gwendal Fève, Takis Kontos, Adrien Mahé, Bernard Etienne, D. C. Glattli, Yong Jin, Antonella Cavanna, Jean-Marc Berroir, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Berroir, Jean-Marc
Subjects: Physics, Photon, Quantum point contact, Fermi energy, 02 engineering and technology, Electron, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 7. Clean energy, 01 natural sciences, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Tunnel effect, Quantum dot, Ballistic conduction, Qubit, 0103 physical sciences, Atomic physics, 010306 general physics, 0210 nano-technology, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]
Abstract: We report on the realization of a single electron source similar to single photon sources in optics providing an important brick for the implementation of flying quantum bits in ballistic conductors. On demand single electron injection is obtained using a quantum dot connected to the conductor via a tunnel barrier of variable transmission (quantum point contact). Electron emission is triggered by a sudden change of the dot potential which brings a single energy level above the Fermi energy in the conductor. A single charge is emitted on an average time ranging from 100 ps to 10 ns ultimately determined by the barrier transparency and the dot charging energy.
Published: 2008
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24. Experimental Test of the High-Frequency Quantum Shot Noise Theory in a Quantum Point Contact

Author: Fabien Portier, Yong Jin, J. Ségala, Eva Zakka-Bajjani, Patrice Roche, D. C. Glattli, Antonella Cavanna, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), and Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, High Frequency, Condensed Matter - Mesoscale and Nanoscale Physics, Quantum noise, Quantum point contact, Shot noise, FOS: Physical sciences, General Physics and Astronomy, 02 engineering and technology, Photon energy, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, 01 natural sciences, Noise generator, Quantum mechanics, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Quantum Point Contact, Scattering theory, Shot Noise, 010306 general physics, 0210 nano-technology, Quantum, Energy (signal processing), [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]
Abstract: We report on direct measurements of the electronic shot noise of a quantum point contact at frequencies nu in the range 4-8 GHz. The very small energy scale used ensures energy independent transmissions of the few transmitted electronic modes and their accurate knowledge. Both the thermal energy and the quantum point contact drain-source voltage Vds are comparable to the photon energy hnu leading to observation of the shot noise suppression when $V_{ds}, Comment: Version Published in Phys. Rev. Lett. (Phys. Rev. Lett. 99, 236803 (2007))
Published: 2007
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25. Shot Noise in Fabry-Perot Interferometers Based on Carbon Nanotubes

Author: D. C. Glattli, Bernard Plaçais, L. G. Herrmann, Jean-Marc Berroir, T. Delattre, Pascal Morfin, and Takis Kontos
Subjects: Physics, Nanotube, Noise power, Quantum decoherence, business.industry, Quantum noise, Shot noise, General Physics and Astronomy, Spectral density, 02 engineering and technology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, 01 natural sciences, Noise (electronics), Optics, 0103 physical sciences, 010306 general physics, 0210 nano-technology, business, Fabry–Pérot interferometer
Abstract: We report on shot noise measurements in carbon nanotube based Fabry-Perot electronic interferometers. As a consequence of quantum interference, the noise power spectral density oscillates as a function of the voltage applied to the gate electrode. The quantum shot noise theory accounts for the data quantitatively and allows us to determine directly the transmissions of the two channels characterizing the nanotube. In the weak backscattering regime, the dependence of the noise on the backscattering current is found weaker than expected, pointing either to electron-electron interactions or to weak decoherence.
Published: 2007
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26. The relaxation time of a chiral quantum R-L circuit

Author: Bernard Etienne, Markus Büttiker, Yong Jin, Takis Kontos, Julien Gabelli, Bernard Plaçais, Jean-Marc Berroir, Gwendal Fève, D. C. Glattli, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Département de Physique Théorique, Université de Genève = University of Geneva (UNIGE), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and University of Geneva [Switzerland]
Subjects: Admittance, Quantum point contact, General Physics and Astronomy, FOS: Physical sciences, Carrier relaxation time, 02 engineering and technology, Electron, ddc:500.2, Quantum Hall effect, 01 natural sciences, Ballistic conduction, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Inductors, 010306 general physics, Quantum, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Physics, Condensed matter physics, Condensed Matter - Mesoscale and Nanoscale Physics, Resistors, Charge (physics), Quantum point contacts, 021001 nanoscience & nanotechnology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Conductors (electric), RLC circuits, Scattering theory, 0210 nano-technology
Abstract: We report on the GHz complex admittance of a chiral one-dimensional ballistic conductor formed by edge states in the quantum Hall regime. The circuit consists of a wide Hall bar (the inductor L) in series with a tunable resistor (R) formed by a quantum point contact. Electron interactions between edges are screened by a pair of side gates. Conductance steps are observed on both real and imaginary parts of the admittance. Remarkably, the phase of the admittance is transmission independent. This shows that the relaxation time of a chiral R -L circuit is resistance independent. A current and charge conserving scattering theory is presented that accounts for this observation with a relaxation time given by the electronic transit time in the circuit.
Published: 2007
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27. Violation of Kirchhoff's laws for a coherent RC circuit

Author: Jean-Marc Berroir, Yong Jin, Antonella Cavanna, Bernard Plaçais, Bernard Etienne, Gwendal Fève, D. C. Glattli, Julien Gabelli, Laboratoire Pierre Aigrain (LPA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Quantum optics, Physics, Mesoscopic physics, Multidisciplinary, Condensed Matter - Mesoscale and Nanoscale Physics, Landauer formula, FOS: Physical sciences, 02 engineering and technology, 021001 nanoscience & nanotechnology, Series and parallel circuits, 01 natural sciences, law.invention, Capacitor, Law, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Resistor, 010306 general physics, 0210 nano-technology, RC circuit, Electrical impedance, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]
Abstract: What is the complex impedance of a fully coherent quantum resistance-capacitance ( RC ) circuit at gigahertz frequencies in which a resistor and a capacitor are connected in series? While Kirchhoff's laws predict addition of capacitor and resistor impedances, we report on observation of a different behavior. The resistance, here associated with charge relaxation, differs from the usual transport resistance given by the Landauer formula. In particular, for a single-mode conductor, the charge-relaxation resistance is half the resistance quantum, regardless of the transmission of the mode. The new mesoscopic effect reported here is relevant for the dynamical regime of all quantum devices.
Published: 2006

28. Cotunneling and one-dimensional localization in individual disordered single-wall carbon nanotubes: Temperature dependence of the intrinsic resistance

Author: Bo Gao, Adrian Bachtold, Bernard Plaçais, D. C. Glattli, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, Coulomb blockade, Carbon nanotubes, 02 engineering and technology, Activation energy, Carbon nanotube, 01 natural sciences, law.invention, Tunnelling, Hopping conduction, law, Electrical resistivity and conductivity, 0103 physical sciences, 010306 general physics, Quantum tunnelling, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], 73.63.Fg, 73.20.Fz, 73.23.Hk, Condensed matter physics, Quantum dots, Electrical resistivity, Charge (physics), Atmospheric temperature range, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 3. Good health, Electronic, Optical and Magnetic Materials, Quantum dot, Kink bands, 0210 nano-technology
Abstract: 5 pages, 4 figures.-- PACS nrs.: 73.63.Fg; 73.20.Fz; 73.23.Hk.-- ArXiv pre-print available at: http://arxiv.org/abs/cond-mat/0606473, We report on the temperature dependence of the intrinsic resistance of long individual disordered single-wall carbon nanotubes. The resistance grows dramatically as the temperature is reduced, and the functional form is consistent with an activated behavior. These results are described by a Coulomb blockade along a series of quantum dots. We occasionally observe a kink in the activated behavior that reflects the change of the activation energy as the temperature range is changed. This is attributed to charge hopping events between nonadjacent quantum dots, which is possible through cotunneling processes., LPA is CNRS-UMR8551 associated with Paris 6 and 7. The research has been supported by ACN, Sesame.
Published: 2006
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29. Four-point resistance of individual single-wall carbon nanotubes

Author: Adrian Bachtold, D. C. Glattli, Michael S. Fuhrer, Yng-Gwei Chen, Bo Gao, Berroir, Jean-Marc, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Department of Physics and Center for Superconductivity Research, University of Maryland [College Park], University of Maryland System-University of Maryland System, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and National Science Foundation (US)
Subjects: Materials science, Physics::Instrumentation and Detectors, FOS: Physical sciences, General Physics and Astronomy, 02 engineering and technology, Carbon nanotube, 7. Clean energy, 01 natural sciences, law.invention, [PACS] Relaxation times and mean free paths, Condensed Matter::Materials Science, [PACS] Fullerenes and related materials, Electrical resistivity and conductivity, law, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Composite material, 010306 general physics, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Condensed Matter - Mesoscale and Nanoscale Physics, Condensed matter physics, Coulomb blockade, [PACS] Electronic transport in mesoscopic systems, 021001 nanoscience & nanotechnology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 3. Good health, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], [PACS] Nanotubes, Electrode, Current (fluid), Resistor, 0210 nano-technology, Voltage drop, Voltage
Abstract: 4 pages, 5 figures.-- PACS nrs.: 73.63.Fg, 72.15.Lh, 72.80.Rj, 73.23.−b.-- ArXiv pre-print available at: http://arxiv.org/abs/cond-mat/0505041, We have studied the resistance of single-wall carbon nanotubes measured in a four-point configuration with noninvasive voltage electrodes. The voltage drop is detected using multiwalled carbon nanotubes while the current is injected through nanofabricated Au electrodes. The resistance at room temperature is shown to be linear with the length as expected for a classical resistor. This changes at cryogenic temperature; the four-point resistance then depends on the resistance at the Au-tube interfaces and can even become negative due to quantum-interference effects., The research in Paris has been supported by ACN, Sesame. Y. F. C. and M. S. F. acknowledge support from the U.S. National Science Foundation through Grant No. DMR- 0102950. LPA is CNRS-UMR8551 associated with Paris 6 and 7.
Published: 2006

30. A quantum mesoscopic RC circuit realized in a 2D electron gas

Author: Jean-Marc Berroir, Bernard Plaçais, Gwendal Fève, D. C. Glattli, Bernard Etienne, Julien Gabelli, Yong Jin, Berroir, Jean-Marc, Laboratoire Pierre Aigrain (LPA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), Centre National de la Recherche Scientifique (CNRS), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Mesoscopic physics, Condensed matter physics, Landauer formula, 02 engineering and technology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Capacitance, Atomic and Molecular Physics, and Optics, 3. Good health, Electronic, Optical and Magnetic Materials, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Quantum mechanics, 0103 physical sciences, 72.10.Bg, 72.30.+q, Scattering theory, 010306 general physics, 0210 nano-technology, Fermi gas, RC circuit, Constant (mathematics), Quantum, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]
Abstract: The quantum resistance and capacitance of a mesoscopic RC circuit made of a small dot connected to a lead by a QPC realized in a 2DEG are measured for the first time. Contrary to what can be naively expected, in the coherent regime the resistance is not given by the Landauer formula but is nearly constant and is found to be close to half the resistance according to Buttiker's AC quantum scattering theory.
Published: 2005
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31. Determination of the Intershell Conductance in Multiwalled Carbon Nanotubes

Author: Adrian Bachtold, D. C. Glattli, László Forró, B. Bourlon, C. Miko, Laboratoire Pierre Aigrain (LPA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Ecole Polytechnique Fédérale de Lausanne (EPFL), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Berroir, Jean-Marc, Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Materials science, FOS: Physical sciences, General Physics and Astronomy, Nanotechnology, 02 engineering and technology, Carbon nanotube, 01 natural sciences, Molecular physics, law.invention, Tunnel effect, Atomic orbital, Electrical resistivity and conductivity, law, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, Physics::Atomic and Molecular Clusters, 010306 general physics, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Quantum tunnelling, Resistive touchscreen, Condensed Matter - Mesoscale and Nanoscale Physics, Conductance, Disordered Systems and Neural Networks (cond-mat.dis-nn), Condensed Matter - Disordered Systems and Neural Networks, 021001 nanoscience & nanotechnology, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Electrode, 0210 nano-technology
Abstract: We report on the intershell electron transport in multiwalled carbon nanotubes (MWNT). To do this, local and nonlocal four-point measurements are used to study the current path through the different shells of a MWNT. For short electrode separations $\lesssim$ 1 $\mu$m the current mainly flows through the two outer shells, described by a resistive transmission line with an intershell conductance per length of ~(10 k\Omega)^{-1}/$\mu$m. The intershell transport is tunnel-type and the transmission is consistent with the estimate based on the overlap between $\pi$-orbitals of neighboring shells., Comment: 5 pages, 4 figures
Published: 2004
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32. Fano factor reduction on the 0.7 conductance structure of a ballistic one-dimensional wire

Author: J. T. Nicholls, Michelle Y. Simmons, David A. Ritchie, Patrice Roche, Michael Pepper, D. C. Glattli, Kalarikad Thomas, A. C. Graham, and J. Ségala
Subjects: Physics, QUANTUM POINT CONTACTS, Fano factor, Research Groups and Centres\Physics\Low Temperature Physics, Condensed matter physics, Faculty of Science\Physics, Shot noise, General Physics and Astronomy, Conductance, ELECTRON-GAS, 02 engineering and technology, 021001 nanoscience & nanotechnology, Thermal conduction, 01 natural sciences, Magnetic field, Electrical resistivity and conductivity, SCATTERING-THEORY, Ballistic conduction, 0103 physical sciences, 010306 general physics, 0210 nano-technology, Fermi gas, SHOT-NOISE
Abstract: We have measured the nonequilibrium current noise in a ballistic one-dimensional wire which exhibits an additional conductance plateau at 0.7x2e(2)/h. The Fano factor shows a clear reduction on the 0.7 structure, and eventually vanishes upon applying a strong parallel magnetic field. These results provide experimental evidence that the 0.7 structure is associated with two conduction channels that have different transmission probabilities.
Published: 2004
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33. Evidence for Luttinger-Liquid Behavior in Crossed Metallic Single-Wall Nanotubes

Author: Bo Gao, Reinhold Egger, D. C. Glattli, Adrian Bachtold, A. Komnik, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Physikalisches Institut [Freiburg], Albert-Ludwigs-Universität Freiburg, Institut fur Theoretische Physik, Heinrich Heine Universitat, Heinrich Heine Universität Düsseldorf = Heinrich Heine University [Düsseldorf], Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), and Berroir, Jean-Marc
Subjects: Nanotube, Materials science, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed matter physics, FOS: Physical sciences, General Physics and Astronomy, 02 engineering and technology, Electron, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 021001 nanoscience & nanotechnology, 01 natural sciences, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Metal, Coupling (electronics), Luttinger liquid, visual_art, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 0103 physical sciences, visual_art.visual_art_medium, Current (fluid), Anomaly (physics), 010306 general physics, 0210 nano-technology, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Quantum tunnelling
Abstract: Experimental and theoretical results for transport through crossed metallic single-wall nanotubes are presented. We observe a zero-bias anomaly in one tube which is suppressed by a current flowing through the other nanotube. The phenomenon is shown to be consistent with the picture of strongly correlated electrons within the Luttinger liquid model. The most relevant coupling between the nanotubes is the electrostatic interaction generated via crossing-induced backscattering processes. Explicit solution of a simplified model is able to describe qualitatively the observed experimental data with only one adjustable parameter., 5 pages, 4 figures
Published: 2004
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34. Hanbury-Brown Twiss correlations to probe the population statistics of GHz photons emitted by conductors

Author: Gwendal Fève, D. C. Glattli, L.-H. Reydellet, Bernard Plaçais, Jean-Marc Berroir, Julien Gabelli, Patrice Roche, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Photon, General Physics and Astronomy, Physics::Optics, FOS: Physical sciences, 02 engineering and technology, Electron, 7. Clean energy, 01 natural sciences, law.invention, Nuclear physics, Generator (circuit theory), law, quantum conductor, Quantum mechanics, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), 010306 general physics, Quantum, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Physics, Photon antibunching, photon statistics, Condensed Matter - Mesoscale and Nanoscale Physics, Hanbury Brown and Twiss effect, 73.23.-b,73.50.Td,42.50.-p,42.50.Ar, 021001 nanoscience & nanotechnology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, MilliKelvin GigaHertz photon correlations, Radio frequency, Resistor, 0210 nano-technology
Abstract: We present the first study of the statistics of GHz photons in quantum circuits, using Hanbury-Brown and Twiss correlations. The superpoissonian and poissonian photon statistics of thermal and coherent sources respectively made of a resistor and a radiofrequency generator are measured down to the quantum regime at milliKelvin temperatures. As photon correlations are linked to the second and fourth moments of current fluctuations, this experiment, which is based on current cryogenic electronics, may become a standard for probing electron/photon statistics in quantum conductors, Comment: soumis le 22 mars 2004
Published: 2004

35. Geometrical Dependence of High-Bias Current in Multiwalled Carbon Nanotubes

Author: B. Bourlon, László Forró, Jean-Marc Berroir, C. Miko, Bernard Plaçais, Adrian Bachtold, D. C. Glattli, Laboratoire Pierre Aigrain (LPA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Ecole Polytechnique Fédérale de Lausanne (EPFL), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Berroir, Jean-Marc
Subjects: Nanotube, Materials science, Condensed matter physics, Condensed Matter - Mesoscale and Nanoscale Physics, Zener tunneling, Shell (structure), General Physics and Astronomy, FOS: Physical sciences, Biasing, Nanotechnology, 02 engineering and technology, Scattering process, 021001 nanoscience & nanotechnology, Multiwalled carbon, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 01 natural sciences, [PHYS.COND.CM-MSQHE] Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Condensed Matter::Materials Science, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Current (fluid), 010306 general physics, 0210 nano-technology, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]
Abstract: We have studied the high-bias transport properties of the different shells that constitute a multiwalled carbon nanotube. The current is shown to be reduced as the shell diameter is decreased or the length is increased. We assign this geometrical dependence to the competition between electron-phonon scattering process and Zener tunneling., 4 pages, 4 figures
Published: 2003

36. Effect of interactions on the noise of chiral Luttinger liquid systems

Author: Hubert Saleur, Patrice Roche, D. C. Glattli, Björn Trauzettel, Laboratoire de Physique des Solides (LPS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire Pierre Aigrain (LPA), Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Service de Physique Théorique (SPhT), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS), Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Condensed Matter - Mesoscale and Nanoscale Physics, Strongly Correlated Electrons (cond-mat.str-el), Quantum point contact, Quantum noise, Shot noise, FOS: Physical sciences, Quantum Hall effect, Condensed Matter Physics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 01 natural sciences, 010305 fluids & plasmas, 3. Good health, Electronic, Optical and Magnetic Materials, Background noise, Condensed Matter - Strongly Correlated Electrons, Luttinger liquid, Quantum mechanics, Quantum electrodynamics, 0103 physical sciences, Fractional quantum Hall effect, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Quasiparticle, 010306 general physics, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]
Abstract: We analyze the current noise, generated at a quantum point contact in fractional quantum Hall edge state devices, using the chiral Luttinger liquid model with an impurity and the associated exact field theoretic solution. We demonstrate that an experimentally relevant regime of parameters exists where the noise coincides with the partition noise of independent Laughlin quasiparticles. However, outside of this regime, this independent particle picture breaks down and the inclusion of interaction effects is essential to understand the shot noise., Comment: 4 pages, 3 figures; v2: modified FIG.1, new FIG.2
Published: 2003
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37. Quantum partition noise of photo-created electron-hole pairs

Author: Bernard Etienne, L.-H. Reydellet, Patrice Roche, D. C. Glattli, Yun Jin, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de photonique et de nanostructures (LPN), and Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Fano factor, Noise temperature, Noise spectral density, Quantum point contact, Quantum noise, Condensed Matter (cond-mat), Shot noise, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, General Physics and Astronomy, FOS: Physical sciences, 02 engineering and technology, Condensed Matter, 021001 nanoscience & nanotechnology, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 01 natural sciences, Computational physics, Burst noise, Noise generator, Quantum mechanics, [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other], 0103 physical sciences, 010306 general physics, 0210 nano-technology
Abstract: We show experimentally that even when no bias voltage is applied to a quantum conductor, the electronic quantum partition noise can be investigated using GHz radiofrequency irradiation of a reservoir. Using a Quantum Point Contact configuration as the ballistic conductor we are able to make an accurate determination of the partition noise Fano factor resulting from the photo-assisted shot noise. Applying both voltage bias and rf irradiation we are able to make a definitive quantitative test of the scattering theory of photo-assisted shot noise., Comment: 4 pages, 4 figures
Published: 2003

38. Enhanced shot noise in long quasi-diffusive S-N-S junctions

Author: Tatsushi Akazaki, Hideaki Takayanagi, Patrice Roche, Hélène Perrin, D. C. Glattli, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), NTT Basic Research Laboratories [Atsugi], and NTT Corporation
Subjects: Band gap, Niobium, Incoherent scatter, Energy Engineering and Power Technology, chemistry.chemical_element, S–N–S junction, 02 engineering and technology, 74.50.+r, 74.20.Fg, 74.80.Fp, 01 natural sciences, Andreev reflection, Condensed Matter::Superconductivity, 0103 physical sciences, Electrical and Electronic Engineering, 010306 general physics, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Superconductivity, Physics, Condensed matter physics, Shot noise, Heterojunction, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 2D electron gas, Electronic, Optical and Magnetic Materials, chemistry, 0210 nano-technology, Fermi gas, InAlAs/InGaAs
Abstract: International audience; We present shot noise measurements on superconducting–normal–superconducting junction (S–N–S) where the superconductor is Niobium and the normal conductor is a two-dimensional electron gas in a InAlAs/InGaAs heterojunction. The aim of the measurements was to check the recent predictions [Phys. Rev. Lett. 83 (1999) 2050] that in the limit of incoherent multiple Andreev reflection (I-MAR), i.e. in the elastic regime for Thouless energy much lower than the superconducting gap, the current–voltage characteristics should be quasi-linear but I-MAR could be detected in the shot noise.
Published: 2001
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39. Shot noise and the Luttinger liquid-like properties of the FQHE

Author: V. Rodriguez, D. C. Glattli, Hélène Perrin, Patrice Roche, Yong Jin, Bernard Etienne, Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Microstructures et de Microélectronique (L2M), and Centre National de la Recherche Scientifique (CNRS)
Subjects: Physics, Noise power, Condensed matter physics, 73.40-Hm, Hm 71.10, Pm 72.20.My, Quantum noise, Quantum point contact, Shot noise, 02 engineering and technology, Quantum Hall effect, Luttinger liquids, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, 01 natural sciences, Noise (electronics), Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Luttinger liquid, 0103 physical sciences, Fractional quantum Hall effect, 010306 general physics, 0210 nano-technology, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]
Abstract: International audience; We present shot noise measurements in the Fractional Quantum Hall regime at . The two fractional edge channels which carry the current at the two opposite boundaries of a quantum Hall sample are weakly coupled by an artificial impurity, namely a Quantum Point Contact. This coupling gives rise to a current between the two edge channels and the random transfer of the charges gives rise to fluctuations of the current. For a weak coupling and for large voltages, recent experiments have established that the current noise power SI is proportional to the backscattered current IB and to the fractional charge e/3. For low voltages at low temperature, the chiral Luttinger liquid models suggest a renormalization of the coupling strength leading to strong backscattering even when the bare coupling is weak. These models predict a noise power proportional to the transmitted current I and to the electronic charge e. The new noise measurements presented here confirm the shot noise predictions at moderately low temperatures. However, at very low temperature, measurements show a surprising enhancement of the shot noise which is nearly doubled.
Published: 2000
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40. Beyond the linearity of current-voltage characteristics in multiwalled carbon nanotubes

Author: László Forró, B. Bourlon, Adrian Bachtold, D. C. Glattli, C. Miko, Laboratoire Pierre Aigrain (LPA), Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Department of Applied Physics, California Institute of Technology (CALTECH), Ecole Polytechnique Fédérale de Lausanne (EPFL), Service de physique de l'état condensé (SPEC - UMR3680), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), ICN and CNM-CSIC, Universitat Autònoma de Barcelona (UAB), Swiss National Science Foundation, Université Pierre et Marie Curie - Paris 6 (UPMC)-Université Paris Diderot - Paris 7 (UPD7)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: FOS: Physical sciences, 02 engineering and technology, Multiwalled carbon, 01 natural sciences, Current voltage, 0103 physical sciences, Mesoscale and Nanoscale Physics (cond-mat.mes-hall), Materials Chemistry, [PACS] Scattering by phonons, magnons, and other nonlocalized excitations, Electrical and Electronic Engineering, 010306 general physics, [PHYS.COND.CM-MSQHE]Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall], Physics, Condensed matter physics, Condensed Matter - Mesoscale and Nanoscale Physics, [PACS] High-field and nonlinear effects, Conductance, Linearity, Biasing, 021001 nanoscience & nanotechnology, Condensed Matter Physics, Electron transport chain, Electronic, Optical and Magnetic Materials, [PACS] Nanotubes, Current (fluid), 0210 nano-technology, Caltech Library Services
Abstract: 5 pages, 5 figures.-- PACS nrs.: 73.63.Fg, 73.50.Fq, 72.10.Di.-- ArXiv pre-print available at: http://arxiv.org/abs/cond-mat/0610519, We present local and non-local electron transport measurements on individual multi-wall nanotubes for bias voltages between 0 and about 4 V. Local current–voltage characteristics are quite linear. In contrast, non-local measurements are highly nonlinear; the differential non-local conductance can even become negative in the high-bias regime. We discuss the relationship between these results and transport parameters such as the elastic length, the number of current carrying shells and the number of conducting modes., LPA is CNRS-UMR8551 associated to University Paris 6 and 7. The research has been supported by the DGA, ACN, Sesame, the Swiss National Science Foundation, and its NCCR ‘Nanoscale Science’.
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