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

Abstract

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.

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

References in corpus (2)

• Formation Mechanism of Hybridization Gap in Kondo Insulators based on a Realistic Band Model and Application to YbB${}_{12}$
• Dynamics and transport properties of Kondo insulators

Cited by in corpus (7)

• Electrodynamics of Correlated Electron Materials
• Indirect and direct energy gaps in the Kondo semiconductor YbB12
• Origin of infrared peaks in the optical conductivity of ytterbium compounds
• Optical conductivity of filled skutterudites
• Absence of Hybridization Gap in Heavy Electron Systems and Analysis of YbAl3 in terms of Nearly Free Electron Conduction Band
• Calculation of Optical Conductivity, Resistivity and Thermopower of Filled Skutterudite CeRu${}_4$Sb${}_{12}$ based on a Realistic Tight-binding Model with Strong Correlation
• Theory for Magnetic Anisotropy of Field-Induced Insulator-to-Metal Transition in Cubic Kondo Insulator YbB_{12}