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ID 33908
本文ファイル
著者
Yamaoka, Hitoshi
Thunström, Patrik
Tsujii, Naohito
Jarrige, Ignace
Arita, Masashi
Hayashi, Hirokazu
Jiang, Jian
Hiraoka, Nozomu
Ishii, Hirofumi
Tsuei, Ku-Ding
Giovannini, Mauro
Bauer, Ernst
NDC
物理学
抄録(英)
We have examined the electronic structure of the heavy fermion Yb2Pd2Sn in comparison with the superconductor YbPd2Sn by means of high-resolution photoelectron spectroscopy (PES) and resonant x-ray emission spectroscopy (RXES). The PES data are interpreted in light of the density of states calculated within the local density approximation plus the dynamical mean-field theory. Our analysis of the RXES data shows that the valence of Yb in Yb2Pd2Sn is weakly fluctuating, indicating weak but finite c–f hybridization, and decreases slightly with temperature. In contrast, the Yb valence in YbPd2Sn is nearly 3+ and does not show any temperature dependence, suggesting that the Yb 4f electrons are localized and the superconductivity is due to the Pd conduction electrons. The constant initial state spectra at the Yb 4d–4f resonance for Yb2Pd2Sn clearly show resonant behavior for Yb3+ and antiresonance for Yb2+, indicating that the Yb3+ and Yb2+ states are intimately correlated.
掲載誌名
Physical Review B
86巻
8号
開始ページ
085137
出版年月日
2012
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
(c) 2012 American Physical Society
関連情報URL
部局名
放射光科学研究センター