Volume 82, Number 5, June 2008
|Number of page(s)||5|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||27 May 2008|
Dirac fermions in a power-lawcorrelated random vector potential
Department of Physics and Astronomy, University of North Carolina - Chapel Hill, NC 27599, USA
Accepted: 21 April 2008
We study localization properties of two-dimensional Dirac fermions subject to a power-lawcorrelated random vector potential describing, e.g., the effect of “ripples” in a free standing graphene. By using a variety of techniques (low-order perturbation theory, self-consistent Born approximation, replicas, and supersymmetry) we compute the low-energy density of states and discuss a possible (pre)localization of the entire single-particle spectrum.
PACS: 71.10 Pm – Fermions in reduced dimensions (anyons, composite fermions, Luttinger liquid, etc.) / 72.15 Rn – Localization effects (Anderson or weak localization) / 73.20 Jc – Delocalization processes
© EPLA, 2008
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