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Widely Tunable Quantum Phase Transition from Moore-Read to Composite Fermi Liquid in Bilayer Graphene.
Zhu, Zheng; Sheng, D N; Sodemann, Inti.
Afiliación
  • Zhu Z; Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
  • Sheng DN; Department of Physics and Astronomy, California State University, Northridge, California 91330, USA.
  • Sodemann I; Max-Planck Institute for the Physics of Complex Systems, D-01187 Dresden, Germany.
Phys Rev Lett ; 124(9): 097604, 2020 Mar 06.
Article en En | MEDLINE | ID: mdl-32202902
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 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 n=0 and 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 n=0/1 orbits.

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2020 Tipo del documento: Article País de afiliación: Estados Unidos

Texto completo: 1 Colección: 01-internacional Banco de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2020 Tipo del documento: Article País de afiliación: Estados Unidos