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Hofstadter butterflies of bilayer graphene

URN to cite this document:
urn:nbn:de:bvb:355-epub-18968
Nemec, Norbert ; Cuniberti, Gianaurelio
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Date of publication of this fulltext: 05 Aug 2009 13:34



Abstract

We calculate the electronic spectrum of bilayer graphene in perpendicular magnetic fields non-perturbatively. To accomodate 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 relative position of the two layers against each other. The ...

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