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

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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.

Original languageEnglish
Article number073024
JournalNew Journal of Physics
Volume11
DOIs
Publication statusPublished - 2009 Jul 9

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Chen, C. L., Rao, S. M., Wang, K. J., Hsu, F. C., Lee, Y. C., Dong, C. L., Chan, T. S., Lee, J. F., Ling, M. C., Liu, H. L., & Wu, M. K. (2009). Investigation of the unoccupied states in Sr2YRuO6 single crystals doped with Cu. New Journal of Physics, 11, [073024]. https://doi.org/10.1088/1367-2630/11/7/073024