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

C. L. Chen; S. M. Rao; K. J. Wang; F. C. Hsu; Y. C. Lee; C. L. Dong; T. S. Chan; J. F. Lee; M. C. Ling; H. L. Liu; M. K. Wu

doi:10.1088/1367-2630/11/7/073024

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

C. L. Chen, S. M. Rao, K. J. Wang, F. C. Hsu, Y. C. Lee, C. L. Dong, T. S. Chan, J. F. Lee, M. C. Ling, H. L. Liu, M. K. Wu

Department of Physics

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The electronic structure single crystals of the new double perovskite Sr₂YRu_1-xCu_xO₆ (x = 0-0.05) has been investigated by x-ray absorption nearedge structure (XANES) spectroscopy. The Cu K-edge spectra show that Cu is incorporated as Cu¹⁺ and Cu ²⁺ 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.

Original language	English
Article number	073024
Journal	New Journal of Physics
Volume	11
DOIs	https://doi.org/10.1088/1367-2630/11/7/073024
Publication status	Published - 2009 Jul 9

ASJC Scopus subject areas

General Physics and Astronomy

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10.1088/1367-2630/11/7/073024

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@article{690510e03b99467ba28ba22f6ae068a0,

title = "Investigation of the unoccupied states in Sr2YRuO6 single crystals doped with Cu",

abstract = "The electronic structure single crystals of the new double perovskite Sr2YRu1-xCuxO6 (x = 0-0.05) has been investigated by x-ray absorption nearedge structure (XANES) spectroscopy. The Cu K-edge spectra show that Cu is incorporated as Cu1+ and Cu 2+ 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.",

author = "Chen, {C. L.} and Rao, {S. M.} and Wang, {K. J.} and Hsu, {F. C.} and Lee, {Y. C.} and Dong, {C. L.} and Chan, {T. S.} and Lee, {J. F.} and Ling, {M. C.} and Liu, {H. L.} and Wu, {M. K.}",

year = "2009",

month = jul,

day = "9",

doi = "10.1088/1367-2630/11/7/073024",

language = "English",

volume = "11",

journal = "New Journal of Physics",

issn = "1367-2630",

publisher = "IOP Publishing Ltd.",

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TY - JOUR

T1 - Investigation of the unoccupied states in Sr2YRuO6 single crystals doped with Cu

AU - Chen, C. L.

AU - Rao, S. M.

AU - Wang, K. J.

AU - Hsu, F. C.

AU - Lee, Y. C.

AU - Dong, C. L.

AU - Chan, T. S.

AU - Lee, J. F.

AU - Ling, M. C.

AU - Liu, H. L.

AU - Wu, M. K.

PY - 2009/7/9

Y1 - 2009/7/9

N2 - The electronic structure single crystals of the new double perovskite Sr2YRu1-xCuxO6 (x = 0-0.05) has been investigated by x-ray absorption nearedge structure (XANES) spectroscopy. The Cu K-edge spectra show that Cu is incorporated as Cu1+ and Cu 2+ 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.

AB - The electronic structure single crystals of the new double perovskite Sr2YRu1-xCuxO6 (x = 0-0.05) has been investigated by x-ray absorption nearedge structure (XANES) spectroscopy. The Cu K-edge spectra show that Cu is incorporated as Cu1+ and Cu 2+ 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.

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DO - 10.1088/1367-2630/11/7/073024

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JO - New Journal of Physics

JF - New Journal of Physics

M1 - 073024

ER -

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

Abstract

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