Theory of the magnetic-field-induced insulator in neutral graphene sheets

J. Jung, A. H. MacDonald

Research output: Contribution to journalArticlepeer-review

89 Scopus citations

Abstract

Recent experiments have demonstrated that neutral graphene sheets have an insulating ground state in the presence of an external magnetic field. We report on a π -band tight-binding-model Hartree-Fock calculation which examines the competition between distinct candidate insulating ground states. We conclude that for graphene sheets on substrates the ground state is most likely a field-induced spin-density wave and that a charge-density-wave state is possible for suspended samples. Neither of these density-wave states support gapless edge excitations.

Original languageEnglish
Article number235417
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number23
DOIs
StatePublished - 10 Dec 2009

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