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Generic miniband structure of graphene on a hexagonal substrate

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Article number245408
<mark>Journal publication date</mark>4/06/2013
<mark>Journal</mark>Physical Review B
Issue number24
Volume87
Number of pages7
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

Using a general symmetry-based approach, we provide a classification of generic miniband structures for electrons in graphene placed on substrates with the hexagonal Bravais symmetry. In particular, we identify conditions at which the first moire miniband is separated from the rest of the spectrum by either one or a group
of three isolated mini Dirac points and is not obscured by dispersion surfaces coming from other minibands. In such cases, the Hall coefficient exhibits two distinct alternations of its sign as a function of charge carrier density.

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©2013 American Physical Society