Hofstadter Butterflies Of Bilayer Graphene

PHYSICAL REVIEW B, no. 20 (2007)

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We calculate the electronic spectrum of bilayer graphene in perpendicular magnetic fields nonperturbatively. To accommodate arbitrary displacements between the two layers, we apply a periodic gauge based on singular flux vortices of phase 2 pi. The resulting Hofstadter-like butterfly plots show a reduced symmetry, depending on the relativ...更多

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