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Generic miniband structure of graphene on a hexagonal substrate

Research output: Contribution to journalJournal article

Published

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Journal publication date4/06/2013
JournalPhysical Review B
Journal number24
Volume87
Number of pages7
Original languageEnglish

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.

Bibliographic note

©2013 American Physical Society