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ID 18731
本文ファイル
著者
Okamura, Hidekazu
Matsunami, Masaharu
Inaoka, Tomoaki
Nanba, Takao
Kimura, Shinichi
Iga, Fumitoshi
Hiura, Sayaka
Klijn, Jan
抄録(英)
We have measured the optical conductivity σ(ω) of Yb1-xLuxB12 (0≤x≤1), where the system evolves from a Kondo semiconductor at x=0 to a nonmagnetic metal at x=1. For x=0, σ(ω) exhibits a clear energy gap with an onset at ∼20 meV and a shoulder at 38 meV. As x increases, the gap is rapidly filled in from the bottom, while the shoulder remains at ∼40 meV up to x=1/2. These results suggest that Lu substitution into YbB12 produces an in-gap band, but the characteristic energy for the gap remains unchanged in a wide range of x. Spectral evolutions of a characteristic mid-infrared peak, which results from Yb 4f-derived states near the Fermi level, suggest a strong coupling of Yb 4f electrons with conduction electrons.
掲載誌名
Physical Review B - Condensed Matter and Materials Physics
62巻
20号
開始ページ
R13 265
終了ページ
R13 269
出版年月日
2000-11-15
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) 2000 American Physical Society.
関連情報URL
部局名
先端物質科学研究科