Large Berry phases in layered graphene
Materials Science
2009-11-13 v2 Mesoscale and Nanoscale Physics
Abstract
Brillouin zones of graphene systems possess Dirac points, where band degeneracies occur. We study the variety of (and large magnitude) phases that the electronic states can acquire when a uniform time-dependent electric field carries the electrons around one or more Dirac points in a non-concentric fashion. An experimentally accessible determination of excess Berry phases is proposed involving the Zitterbewegung of electronic current near an orthogonality point in adiabatic motion.
Cite
@article{arxiv.0806.3726,
title = {Large Berry phases in layered graphene},
author = {R. Englman and T. Vértesi},
journal= {arXiv preprint arXiv:0806.3726},
year = {2009}
}
Comments
8 pages, 4 figures; slight addition and reference correction