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ID 18730
本文ファイル
著者
Okamura, Hidekazu
Kimura, Shinichi
Shinozaki, H.
Nanba, Takao
Iga, Fumitoshi
Shimizu, Naoki
抄録(英)
Optical reflectivity experiments have been conducted on single crystals of the Kondo insulator YbB12 in order to obtain its optical conductivity, σ(ω). Upon cooling below 70 K, a strong suppression of σ(ω) is seen in the far-infrared region, indicating the opening of an energy gap of ∼25 meV. This gap development is coincident with a rapid decrease in the magnetic susceptibility, which shows that the gap opening has significant influence on magnetic properties. A narrow, asymmetric peak is observed at ∼40 meV in σ(ω), which is attributed to optical transitions between the Yb 4f-derived states across the gap. In addition, a broad peak is observed at ∼0.25 eV. This peak is attributed to transitions between Yb 4f-derived states and the p-d band, and is reminiscent of similar peaks previously observed for rare-earth hexaborides.
掲載誌名
Physical Review B - Condensed Matter and Materials Physics
58巻
12号
開始ページ
R7496
終了ページ
R7499
出版年月日
1998-09-15
出版者
American Physical Society
ISSN
0163-1829
NCID
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
publisher
権利情報
Copyright (c) 1998 American Physical Society.
関連情報URL
部局名
先端物質科学研究科