Valence fluctuation in Yb3Si5 probed by synchrotron X-ray photoemission spectroscopy

被引：1

作者：

Kuga, Kentaro ^{[1
,2
,3
]}

Matsunami, Masaharu ^{[1
,2
,4
]}

Fujiwara, Hidenori ^{[3
,5
]}

Nozue, Goro ^{[3
,5
]}

Ose, Akane ^{[3
,5
]}

Sekiyama, Akira ^{[3
,5
]}

Yasui, Akira ^{[6
]}

Hamamoto, Satoru ^{[3
]}

Oura, Masaki ^{[3
]}

Takeuchi, Tsunehiro ^{[1
,2
,4
,7
]}

机构：

[1] Toyota Technol Inst, Nagoya, Aichi 4688511, Japan

[2] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

[3] RIKEN SPring 8 Ctr, Sayo, Hyogo 6795148, Japan

[4] Japan Sci & Technol Agcy, MIRAI, Chiyoda Ku, Tokyo 1020076, Japan

[5] Osaka Univ, Grad Sch Engn Sci, Toyonaka, Osaka 5608531, Japan

[6] Japan Synchrotron Radiat Inst JASRI, Sayo, Hyogo 6795198, Japan

[7] Nagoya Univ, Inst Innovat Future Soc, Nagoya, Aichi 4648603, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2023年 / 62卷 / SD期

关键词：

valence fluctuation; thermoelectric material; HAXPES; SXPES; ANGULAR-DISTRIBUTION PARAMETERS; TRANSPORT-PROPERTIES; CRYSTAL-GROWTH; YTTERBIUM;

D O I：

10.35848/1347-4065/aca911

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the direct evidence of valence fluctuation in the thermoelectric material Yb3Si5 by using synchrotron X-ray photoemission spectroscopy. The Yb 3d core level photoemission spectrum of a Yb3Si5 single crystal shows clear separation of the Yb2+ peak and Yb3+ multiplet peaks. From the spectral weight of each component, the mean valence of Yb ions is estimated to be +2.67 at 20 K. Furthermore, a Kondo resonance peak just below the Fermi energy is also observed by high-resolution soft X-ray photoemission spectroscopy, suggesting the valence fluctuating state in Yb3Si5.

引用

页数：4

共 39 条

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