Hole states in CuO2 planes and Cu-O chains of YBa2Cu3O7 and YBa2Cu4O8 probed by soft-x-ray absorption spectroscopy

A. Krol*, Z. H. Ming, Y. H. Kao, N. N̈cker, G. Roth, J. Fink, G. C. Smith, Key Taeck Park, Jaejun Yu, Arthur J Freeman, A. Erband, G. M̈ller-Vogt, J. Karpinski, E. Kaldis, K. Schönmann

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

The symmetry and density of unoccupied states of twin-free YBa2Cu3O7 and YBa2Cu4O8 single crystals have been investigated by orientation-dependent x-ray absorption spectroscopy at the O 1s edge, using a bulk-sensitive fluoresence-yield-detection method. In conjunction with earlier results obtained by electron-energy-loss spectroscopy, the relative density of unoccupied states for different oxygen sites has been derived. Comparison with local-density energy-band-structure calculations shows reasonable agreement with the experimental results.

Original languageEnglish (US)
Pages (from-to)2581-2584
Number of pages4
JournalPhysical Review B
Volume45
Issue number5
DOIs
StatePublished - Jan 1 1992

ASJC Scopus subject areas

  • Condensed Matter Physics

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