Dynamical current-current correlation of the hexagonal lattice and graphene

Details Dynamical current-current correlation of the hexagonal lattice and graphene Dynamical current-current correlation of the hexagonal lattice and graphene

2010-09-20

arxiv.org/abs/1009.3812v2

Phys. Rev. B 82, 155412 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, 3 figures

Scientific paper

10.1103/PhysRevB.82.155412

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.

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