2004/03/18 by Kamal Krishna Saha, Saha, Kamal Krishna, Abhijit Mookerjee +1
Physics and Astronomy · #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #cond-mat.mtrl-sci
paper · pdf · doi:10.48550/arxiv.cond-mat/0403456
15 figures, Phys. Rev. B 70 (2004), in press
arxiv created 2004/11/08 · arxiv updated 2009/12/01
We present here a formulation for the calculation of the configuration-averaged optical conductivity in random alloys. Our formulation is based on the augmented-space theorem introduced by one of us [A. Mookerjee, J. Phys. C: Solid State Phys. 6, 1340 (1973)]. We show that disorder scattering renormalizes the electron and hole propagators as well as the transition amplitude. The corrections to the transition amplitude have been shown to be related to the self-energy of the propagators and vertex corrections.