Calculation of Optical Conductivity of YbB<sub>12</sub>using Realistic Tight-binding Model

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  • Saso Tetsuro
    Department of Physics, Faculty of Sciences, Saitama University

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  • Calculation of Optical Conductivity of YbB12 using Realistic Tight-binding Model

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Based on the previously reported tight-binding model fitted to the LDA+U band calculation, optical conductivity of the prototypical Kondo insulator YbB12 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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