Determination of valence of Cu in superconducting La2-x(Sr,Ba)xCuO4

E. E. Alp*, G. K. Shenoy, D. G. Hinks, D. W. Capone, L. Soderholm, H. B. Schuttler, J. Guo, D. E. Ellis, P. A. Montano, M. Ramanathan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

132 Scopus citations

Abstract

The measurement of Cu K-edge x-ray absorption near-edge structure of monovalent, divalent, and trivalent copper oxides has been used to identify the presence of different valence of copper in the La2-x(Sr,Ba)xCuO4 (x=0.00.3) system. The results indicate the coexistence of Cu ii and Cu iii states in these compounds. Theoretical calculations based on a cluster of CuO4O2La8LaSr predict the presence of nearly degenerate electronic ground states representing nominally Cu ii and Cu iii configurations.

Original languageEnglish (US)
Pages (from-to)7199-7202
Number of pages4
JournalPhysical Review B
Volume35
Issue number13
DOIs
StatePublished - 1987

ASJC Scopus subject areas

  • Condensed Matter Physics

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