Back to Search
Start Over
Competing Fractional Quantum Hall and Electron Solid Phases in Graphene
- Source :
- Physical Review Letters, Physical Review Letters, American Physical Society, 2019, Physical Review Letters, American Physical Society, 2019, 122 (2), ⟨10.1103/PhysRevLett.122.026802⟩
- Publication Year :
- 2019
- Publisher :
- HAL CCSD, 2019.
-
Abstract
- International audience; We report experimental observation of the reentrant integer quantum Hall effect in graphene, appearing in the N=2 Landau level. Similar to high-mobility GaAs/AlGaAs heterostructures, the effect is due to a competition between incompressible fractional quantum Hall states, and electron solid phases. The tunability of graphene allows us to measure the B-T phase diagram of the electron solid phase. The hierarchy of reentrant states suggests spin and valley degrees of freedom play a role in determining the ground state energy. We find that the melting temperature scales with magnetic field, and construct a phase diagram of the electron liquid-solid transition.
- Subjects :
- Materials science
[PHYS.COND.GAS]Physics [physics]/Condensed Matter [cond-mat]/Quantum Gases [cond-mat.quant-gas]
FOS: Physical sciences
General Physics and Astronomy
Electron
Quantum Hall effect
01 natural sciences
7. Clean energy
law.invention
[PHYS.QPHY]Physics [physics]/Quantum Physics [quant-ph]
law
Phase (matter)
Mesoscale and Nanoscale Physics (cond-mat.mes-hall)
0103 physical sciences
[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]
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]
Phase diagram
Spin-½
[PHYS]Physics [physics]
Condensed Matter - Mesoscale and Nanoscale Physics
Condensed matter physics
Graphene
Landau quantization
Condensed Matter::Mesoscopic Systems and Quantum Hall Effect
Ground state
Subjects
Details
- Language :
- English
- ISSN :
- 00319007 and 10797114
- Database :
- OpenAIRE
- Journal :
- Physical Review Letters, Physical Review Letters, American Physical Society, 2019, Physical Review Letters, American Physical Society, 2019, 122 (2), ⟨10.1103/PhysRevLett.122.026802⟩
- Accession number :
- edsair.doi.dedup.....9aeeebcb9a5efe8aa1766c68a5c3d097