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Influence of trigonal warping on interference effects in bilayer graphene

Research output: Contribution to journalJournal article

Published
Article number176806
<mark>Journal publication date</mark>27/04/2007
<mark>Journal</mark>Physical review letters
Issue number17
Volume98
Number of pages4
<mark>State</mark>Published
<mark>Original language</mark>English

Abstract

Bilayer graphene (two coupled graphitic monolayers arranged according to Bernal stacking) is a two-dimensional gapless semiconductor with a peculiar electronic spectrum different from the Dirac spectrum in the monolayer material. In particular, the electronic Fermi line in each of its valleys has a strong p -> -p asymmetry due to trigonal warping, which suppresses the weak localization effect. We show that weak localization in bilayer graphene may be present only in devices with pronounced intervalley scattering, and we evaluate the corresponding magnetoresistance.

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© 2007 The American Physical Society