Calculation of Optical Conductivity of YbB$_{12}$ using Realistic Tight-Binding Model

Details Calculation of Optical Conductivity of YbB$_{12}$ using Realistic Tight-Binding Model Calculation of Optical Conductivity of YbB$_{12}$ using Realistic Tight-Binding Model

2004-09-03

arxiv.org/abs/cond-mat/0409069v1

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 7 figures, use jpsj2.cls, to appear in J. Phys. Soc. Jpn. Vol.73, No.10 (2004)

Scientific paper

10.1143/JPSJ.73.2894

Based on the previously reported tight-binding model fitted to the LDA+U band calculation, optical conductivity of the prototypical Kondo insulator YbB$_{12}$ is calculated theoretically. Many-body effects are taken into account by the self-consistent second order perturbation theory. The gross shape of the optical conductivity observed in experiments are well described by the present calculation, including their temperature-dependences.

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