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Chiral Symmetry and Many-Body Effect in Multilayer Graphene

Influence of the chiral symmetry on the many-body problem in multilayer graphene in magnetic fields is investigated. For a spinless electron model on the honeycomb lattice the many-body ground state is shown to be a doubly-degenerate chiral condensate irrespective of the number of layers. The energy spectrum calculated numerically with the exact diagonalization method reveals for ABC-stacked multilayer graphenes that the many-body gap decreases monotonically with the number of layers.

preprint2012arXivOpen access
Yuji HamamotoTohru KawarabayashiHideo AokiYasuhiro Hatsugai
cond-mat.mes-hall
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Yuji HamamotoTohru KawarabayashiHideo AokiYasuhiro Hatsugai

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