Electronic structure of YbNiX3 (X=Si, Ge) studied by hard X-ray photoemission spectroscopy

被引：2

作者：

Sato, Hitoshi ^{[1
]}

Utsumi, Yuki ^{[2
]}

Kodama, Junichi ^{[3
]}

Nagata, Heisuke ^{[3
]}

Avila, Marcos A. ^{[4
]}

Ribeiro, Raquel A. ^{[4
]}

Umeo, Kazunori ^{[5
]}

Takabatake, Toshiro ^{[6
,7
]}

Mimura, Kojiro ^{[8
]}

Motonami, Satoru ^{[8
]}

Anzai, Hiroaki ^{[8
]}

Ueda, Shigenori ^{[9
]}

Shimada, Kenya ^{[1
]}

Namatame, Hirofumi ^{[1
]}

Taniguchi, Masaki ^{[1
,3
]}

机构：

[1] Hiroshima Univ, Hiroshima Synchrotron Radiat Ctr, Higashihiroshima 7390046, Japan

[2] Max Planck Inst Chem Phys Solids, D-01187 Dresden, Germany

[3] Hiroshima Univ, Grad Sch Sci, Higashihiroshima 7398526, Japan

[4] Univ Fed ABC, Ctr Ciencias Nat & Humanas, BR-09210580 Santo Andre, SP, Brazil

[5] Hiroshima Univ, N BARD, Cryogen & Instrumental Anal Div, Higashihiroshima 7398526, Japan

[6] Hiroshima Univ, AdSM, Dept Quantum Matter, Higashihiroshima 7398530, Japan

[7] Hiroshima Univ, Inst Adv Mat Res, Higashihiroshima 7398530, Japan

[8] Osaka Prefecture Univ, Grad Sch Engn, Sakai, Osaka 5998531, Japan

[9] Natl Inst Mat Sci, Synchrotron Xray Stn, SPring 8, Kobe, Hyogo 6795148, Japan

来源：

PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 12, NO 6 | 2015年 / 12卷 / 06期

关键词：

Kondo lattice; electronic structure; photoemission spectroscopy;

D O I：

10.1002/pssc.201400312

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Electronic structure of the Kondo lattices YbNiX3 (X=Si, Ge) has been investigated by means of hard x-ray photoemission spectroscopy (HAXPES) with h nu = 5.95 keV. From the Yb 3d HAXPES spectra, the Yb valence in YbNiSi3 is estimated to be similar to 2.92, which is almost temperature-independent. On the other hand, the valence in YbNiGe3 is estimated to be 2.48 at 300 K, showing significant valence fluctuation, and gradually decreases to 2.41 at 20 K on cooling. The Ni 2p(3/2) and Yb3+ 4f peaks exhibit opposite energy shifts amounting to similar to 0.6 eV between YbNiSi3 and YbNiGe3. We propose a simple model for the electronic structure of YbNiX3 based on the HAXPES results.

引用

页码：620 / 623

页数：4

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