Correlation Effects on Optical Conductivity of FeSi

Details Correlation Effects on Optical Conductivity of FeSi Correlation Effects on Optical Conductivity of FeSi

1999-07-19

arxiv.org/abs/cond-mat/9907264v2

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1143/JPSJ.68.3477

Effects of electron correlation in FeSi are studied in terms of the two-band Hubbard model with the density of states obtained from the band calculation. Using the self-consistent second-order perturbation theory combined with the local approximation, the correlation effects are investigated on the density of states and the optical conductivity spectrum, which are found to reproduce the experiments done by Damascelli et al. semiquantitatively. It is also found that the peak at the gap edge shifts to lower energy region by correlation effects, as is seen in the experiments.

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