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Saitama University, Graduate School of Science and Engineering
雑誌名
Physica. B, condensed matter
巻
378-380
号
1
ページ
259 - 260
発行年
2006
年月次
2006-5
出版者名
Elsevier B.V.
ISSN
09214526
DOI
info:doi/10.1016/j.physb.2006.01.096
抄録
In order to understand the electronic structures of the typical Kondo insulator YbB12 and some Ce-based skutterudite compounds with an energy gap or a pseudo-gap, e.g. CeOs4Sb12 or CeRu4Sb12, simple tight-binding band models are constructed. Based on these models, the optical conductivity spectra are calculated to confirm our models and to understand the many-body effect therein. The resultant spectra can explain the shape and the temperature-dependence of the experiments rather well. Especially, the mid-infrared peak due to the f-d transitions and its red-shift at lowering temperature are well reproduced.