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ID 14990
本文ファイル
著者
Takeda, Yukiharu
Arita, Masashi
Higashiguchi, Mitsuharu
Iga, Fumitoshi
抄録(英)
The temperature-dependent metal-to-insulator transition in the Kondo semiconductor YbB12 single crystal has been studied by means of high-resolution photoemission spectroscopy with a tunable photon energy. An energy gap in the valence band is gradually formed below T1~150 K, and at the same time, the Yb 4f7/2 Kondo peak at 55 meV grows and shifts to a lower binding energy. Below T2~60 K, an additional spectral feature at 15 meV becomes apparent in the Yb 4f and Yb 5d derived spectra, indicating a strongly hybridized character. The 15 meV feature in the Yb 4f derived spectra is intense at the L point of the Brillouin zone and diminishes away from the L point. These results indicate that the energy gap is formed by the hybridization between the Yb 4f and Yb 5d states.
掲載誌名
Physical Review B
73巻
開始ページ
033202
出版年月日
2006
出版者
American Physical Society
ISSN
1098-0121
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) 2006 American Physical Society
関連情報URL(IsVersionOf)
http://dx.doi.org/10.1103/PhysRevB.73.033202
部局名
総合科学研究科
先端物質科学研究科
放射光科学研究センター