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Composite fermion dynamics in half-filled Landau levels of graphene

Wójs, Arkadiusz, Möller, Gunnar, Cooper, Nigel R (2011) Composite fermion dynamics in half-filled Landau levels of graphene. Acta Physica Polonica A, 119 . p. 592. ISSN 0587-4246. (doi:10.12693/APhysPolA.119.592)

Abstract

We report on exact-diagonalization studies of correlated many-electron states in the half-filled Landau levels of graphene, including pseudospin (valley) degeneracy. We demonstrate that the polarized Fermi sea of non-interacting composite fermions remains stable against a pairing transition in the lowest two Landau levels. However, it undergoes spontaneous depolarization, which is unprotected owing to the lack of single-particle pseudospin splitting. These results suggest the absence of the Pfaffian phase in graphene.

Item Type: Article
DOI/Identification number: 10.12693/APhysPolA.119.592
Uncontrolled keywords: Physics of Quantum Materials
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Divisions: Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Gunnar Moller
Date Deposited: 05 Dec 2017 14:54 UTC
Last Modified: 05 Jul 2019 10:29 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/55551 (The current URI for this page, for reference purposes)
Möller, Gunnar: https://orcid.org/0000-0001-8986-0899
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