Evaluation of the optical conductivity tensor in terms of contour integrations

Details Evaluation of the optical conductivity tensor in terms of contour integrations Evaluation of the optical conductivity tensor in terms of contour integrations

2000-12-11

arxiv.org/abs/cond-mat/0012174v1

J. Phys.: Condens. Matter 11 (1999) 10451-10458

Physics

Condensed Matter

Materials Science

8 pages, Latex + 2 figure (Encapsulated Postscript)

Scientific paper

10.1088/0953-8984/11/50/333

For the case of finite life-time broadening the standard Kubo-formula for the optical conductivity tensor is rederived in terms of Green's functions by using contour integrations, whereby finite temperatures are accounted for by using the Fermi-Dirac distribution function. For zero life-time broadening, the present formalism is related to expressions well-known in the literature. Numerical aspects of how to calculate the corresponding contour integrals are also outlined.

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