Effect of S 3p and Se 4p holes on charge fluctuations in pyrite-type CuS2 and CuSe2 revealed by hard x-ray photoemission spectroscopy

被引：0

作者：

Fujinuma, K. ^{[1
]}

Takegami, D. ^{[1
,2
]}

Melendez-Sans, A. ^{[2
]}

Yoshimura, M. ^{[3
]}

Tsuei, K. -D. ^{[3
]}

Higashinaka, R. ^{[4
]}

Matsuda, T. D. ^{[4
]}

Aoki, Y. ^{[4
]}

Hedo, M. ^{[5
]}

Onuki, Y. ^{[5
]}

Tjeng, L. H. ^{[2
]}

Mizokawa, T. ^{[1
]}

机构：

[1] Waseda Univ, Dept Appl Phys, Tokyo 1698555, Japan

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

[3] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

[4] Tokyo Metropolitan Univ, Dept Phys, Hachioji 1920397, Japan

[5] Univ Ryukyus, Fac Sci, Nishihara, Okinawa 9030213, Japan

来源：

PHYSICAL REVIEW B | 2025年 / 111卷 / 11期

关键词：

ELECTRONIC-STRUCTURE; SUPERCONDUCTING PROPERTIES; MAGNETIC-PROPERTIES; TRANSITION; CRYSTAL; COS2; NIS2;

D O I：

10.1103/PhysRevB.111.115147

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Bulk electronic states of pyrite-type CuS2 and CuSe2 have been investigated by means of hard x-ray photoemission spectroscopy (HAXPES). In the valence-band HAXPES spectra, the Cu 3d subshell is basically fully occupied in CuS2 and CuSe2, and the partially occupied anion p orbitals are responsible for the metallic behavior. This situation is opposite to the various conducting transition-metal compounds with open shell transition-metal cations and closed shell anions. The Cu 2p core-level HAXPES spectra exhibit satellite peaks, which indicate the presence of charge fluctuations mediated by inverse charge transfer from Cu 3d to S 3p/Se 4p.

引用

页数：7

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