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 language | English |
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Pages (from-to) | 2581-2584 |
Number of pages | 4 |
Journal | Physical Review B |
Volume | 45 |
Issue number | 5 |
DOIs | |
Publication status | Published - 1992 |
ASJC Scopus subject areas
- Condensed Matter Physics