Investigation of the unoccupied states in Sr2YRuO6 single crystals doped with Cu

被引：8

作者：

Chen, C. L. ^{[1
]}

Rao, S. M. ^{[1
]}

Wang, K. J. ^{[1
]}

Hsu, F. C. ^{[1
]}

Lee, Y. C. ^{[1
,2
]}

Dong, C. L. ^{[1
]}

Chan, T. S. ^{[3
]}

Lee, J. F. ^{[3
]}

Ling, M. C. ^{[4
]}

Liu, H. L. ^{[4
]}

Wu, M. K. ^{[1
]}

机构：

[1] Acad Sinica, Inst Phys, Taipei, Taiwan

[2] Natl Tsing Hua Univ, Dept Phys, Hsinchu, Taiwan

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

[4] Natl Taiwan Normal Univ, Dept Phys, Taipei 117, Taiwan

来源：

NEW JOURNAL OF PHYSICS | 2009年 / 11卷

关键词：

X-RAY-ABSORPTION; DOUBLE PEROVSKITE; ELECTRONIC-STRUCTURE; BAND-STRUCTURE; SUPERCONDUCTIVITY; RUTHENIUM; MAGNETISM; SPECTRA; BEHAVIOR; SYSTEM;

D O I：

10.1088/1367-2630/11/7/073024

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The electronic structure single crystals of the new double perovskite Sr2YRu1-xCuxO6 (x = 0-0.05) has been investigated by x-ray absorption near-edge structure (XANES) spectroscopy. The Cu K-edge spectra show that Cu is incorporated as Cu1+ and Cu2+ in the crystals grown in air and in an oxygen atmosphere and Ru5+ is seen in the Ru K-edge spectra. The O K-edge and the Ru L-3-edge spectra indicate an increase in the unoccupied states ( hole concentration) as x is increased, accompanied by a lattice distortion from an increased O-Ru-O bond angle. These changes observed even with a small Cu addition are interpreted to result from the Cu 3d-O 2p hybridization as Cu replaces Ru in the octahedral sites.

引用

页数：8

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