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Photo-enhanced antinodal conductivity in the pseudogap state of high Tc cuprates
- Source :
- Nature Communications, Nature communications 5 (2014). doi:10.1038/ncomms5353, info:cnr-pdr/source/autori:Cilento, F.; Dal Conte, S.; Coslovich, G.; Peli, S.; Nembrini, N.; Mor, S.; Banfi, F.; Ferrini, G.; Eisaki, H.; Chan, M. K.; Dorow, C. J.; Veit, M. J.; Greven, M.; van der Marel, D.; Comin, R.; Damascelli, A.; Rettig, L.; Bovensiepen, U.; Capone, M.; Giannetti, C.; Parmigiani, F./titolo:Photo-enhanced antinodal conductivity in the pseudogap state of high-T-c cuprates/doi:10.1038%2Fncomms5353/rivista:Nature communications/anno:2014/pagina_da:/pagina_a:/intervallo_pagine:/volume:5, Nature Communications, Vol. 5 (2014)
- Publication Year :
- 2014
-
Abstract
- A major challenge in understanding the cuprate superconductors is to clarify the nature of the fundamental electronic correlations that lead to the pseudogap phenomenon. Here we use ultrashort light pulses to prepare a non-thermal distribution of excitations and capture novel properties that are hidden at equilibrium. Using a broadband (0.5-2 eV) probe we are able to track the dynamics of the dielectric function, unveiling an anomalous decrease of the scattering rate of the charge carriers in a pseudogap-like region of the temperature ($T$) and hole-doping ($p$) phase diagram. In this region, delimited by a well-defined $T^*_{neq}(p)$ line, the photo-excitation process triggers the evolution of antinodal excitations from gapped (localized) to delocalized quasi-particles characterized by a longer lifetime. The novel concept of photo-enhanced antinodal conductivity is naturally explained within the single-band Hubbard model, in which the short-range Coulomb repulsion leads to a k-space differentiation between "nodal" quasiparticles and antinodal excitations.<br />accepted for publication on Nature Communications
- Subjects :
- Genetics and Molecular Biology (all)
Hubbard model
electron correlations
FOS: Physical sciences
General Physics and Astronomy
ddc:500.2
02 engineering and technology
01 natural sciences
Biochemistry
General Biochemistry, Genetics and Molecular Biology
Article
Settore FIS/03 - Fisica della Materia
Delocalized electron
Physics and Astronomy (all)
Condensed Matter - Strongly Correlated Electrons
copper oxides
pseudogap
Condensed Matter::Superconductivity
0103 physical sciences
Cuprate
010306 general physics
Superconductivity
Physics
Multidisciplinary
Biochemistry, Genetics and Molecular Biology (all)
Strongly Correlated Electrons (cond-mat.str-el)
Condensed matter physics
superconductivity
Chemistry (all)
General Chemistry
Physik (inkl. Astronomie)
021001 nanoscience & nanotechnology
Photoexcitation
Scattering rate
Quasiparticle
Condensed Matter::Strongly Correlated Electrons
0210 nano-technology
Pseudogap
Subjects
Details
- Language :
- English
- ISSN :
- 20411723
- Database :
- OpenAIRE
- Journal :
- Nature Communications, Nature communications 5 (2014). doi:10.1038/ncomms5353, info:cnr-pdr/source/autori:Cilento, F.; Dal Conte, S.; Coslovich, G.; Peli, S.; Nembrini, N.; Mor, S.; Banfi, F.; Ferrini, G.; Eisaki, H.; Chan, M. K.; Dorow, C. J.; Veit, M. J.; Greven, M.; van der Marel, D.; Comin, R.; Damascelli, A.; Rettig, L.; Bovensiepen, U.; Capone, M.; Giannetti, C.; Parmigiani, F./titolo:Photo-enhanced antinodal conductivity in the pseudogap state of high-T-c cuprates/doi:10.1038%2Fncomms5353/rivista:Nature communications/anno:2014/pagina_da:/pagina_a:/intervallo_pagine:/volume:5, Nature Communications, Vol. 5 (2014)
- Accession number :
- edsair.doi.dedup.....b4263dbdd57abfe2b489d8171c8dcc1e