Widely Tunable Quantum Phase Transition from Moore-Read to Composite Fermi Liquid in Bilayer Graphene
Journal Article
·
· Physical Review Letters
- Harvard Univ., Cambridge, MA (United States); OSTI
- California State University, Northridge (CSUN), CA (United States)
- Max-Planck Institute for the Physics of Complex Systems, Dresden (Germany)
Here, we develop a proposal to realize a widely tunable and clean quantum phase transition in bilayer graphene between two paradigmatic fractionalized phases of matter: the Moore-Read fractional quantum Hall state and the composite Fermi liquid metal. This transition can be realized at total fillings $$\textit{ν}$$ = ±3 + 1/2 and the critical point can be controllably accessed by tuning either the interlayer electric bias or the perpendicular magnetic field values over a wide range of parameters. We study the transition numerically within a model that contains all leading single particle corrections to the band structure of bilayer graphene and includes the fluctuations between the $$\textit{n}$$ = 0 and $$\textit{n}$$ = 1 cyclotron orbitals of its zeroth Landau level to delineate the most favorable region of parameters to experimentally access this unconventional critical point. We also find evidence for a new anisotropic gapless phase stabilized near the level crossing of $$\textit{n}$$ = 0/1 orbits.
- Research Organization:
- California State University, Northridge (CSUN), CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- FG02-06ER46305
- OSTI ID:
- 1800370
- Alternate ID(s):
- OSTI ID: 1603731
OSTI ID: 1864871
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 124; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Correlated insulating phases of twisted bilayer graphene at commensurate filling fractions: A Hartree-Fock study
Exciton condensation in quantum Hall bilayers at total filling
Journal Article
·
Sun Jul 19 20:00:00 EDT 2020
· Physical Review. B
·
OSTI ID:1800971
Exciton condensation in quantum Hall bilayers at total filling
Journal Article
·
Sun May 19 20:00:00 EDT 2019
· Physical Review. B
·
OSTI ID:1513808