Optical conductivity of graphene in the presence of random lattice deformations

Details Optical conductivity of graphene in the presence of random lattice deformations Optical conductivity of graphene in the presence of random lattice deformations

2010-10-21

arxiv.org/abs/1010.4510v1

Phys. Rev. B 83, 155115 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

9 pages, 9 figures

Scientific paper

10.1103/PhysRevB.83.155115

We study the influence of lattice deformations on the optical conductivity of a two-dimensional electron gas. Lattice deformations are taken into account by introducing a non-abelian gauge field into the Eucledian action of two-dimensional Dirac electrons. This is in analogy to the introduction of the gravitation in the four-dimensional quantum field theory. We examine the effect of these deformations on the averaged optical conductivity. Within the perturbative theory up to second order we show that corrections of the conductivity due to the deformations cancel each other exactly. We argue that these corrections vanish to any order in perturbative expansion.

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