Dynamical current-current correlation of the hexagonal lattice and graphene
Mesoscale and Nanoscale Physics
2010-10-26 v2
Abstract
We discuss the dynamical current-current correlation function of the hexagonal lattice using a local current operator defined on a continuum-replica model of the original lattice model. In the Dirac approximation, the correlation function can be decomposed into a parallel and perpendicular contribution. We show that this is not possible for the hexagonal lattice even in the Dirac regime. A comparison between the analytical isotropic solution and the numerical results for the honeycomb lattice is given.
Cite
@article{arxiv.1009.3812,
title = {Dynamical current-current correlation of the hexagonal lattice and graphene},
author = {T. Stauber and G. Gómez-Santos},
journal= {arXiv preprint arXiv:1009.3812},
year = {2010}
}
Comments
7 pages, 3 figures