Studies of Y-Ba-Cu-O single crystals by x-ray absorption spectroscopy

Conference · Wed Apr 01 04:00:00 EST 1992 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5001540

Krol, A; Ming, Z H; Kao, Y H ^[1]; Nuecker, N; Roth, G; Fink, J ^[2]; Smith, G C ^[3]; Erband, A; Mueller-Vogt, G ^[4]; Karpinski, J; Kaldis, E ^[5]; Schoenmann, K ^[6]

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1. Department of Physics, SUNY at Buffalo, NY 14260 (United States)
2. Kernforschungszentrum Karlsruhe, Institut fuer NukleareFestkoerperpysik, Postfach 3640, W-7500 Karsruhe (Germany)
3. Brookhaven National Laboratory, Upton, NY 11973 (United States)
4. Universitaet Karlsruhe, Institut fuer Kristallchemie, W-7500 Karsruhe (Germany)
5. Labor fuer Festkoerperphysik, ETH Zuerich, Hoenggerberg/HPF, CH 8093 Zuerich (Switzerland)
6. Walter-Meiner-Institut, W-8046 Garching (Germany)

The symmetry and density of unoccupied states of YBa{sub 2}Cu{sub 3}O{sub 7} and YBa{sub 2}Cu{sub 4}O{sub 8} have been investigated by orientation dependent x-ray absorption spectroscopy on the O 1s edge using a bulk-sensitive fluorescence yield-detection method. It has been found that the O 2{ital p} holes are distributed equally between the CuO{sub 2} planes and CuO chains and that the partial density of unoccupied O 2{ital p} states in the CuO{sub 2} planes are identical in both systems investigated. The upper Hubbard band has been observed in the planes but not in the chains in both systems.

• OSTI ID: 5001540
• Report Number(s): CONF-9109102--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 251:1
• Country of Publication: United States
• Language: English

Related Subjects

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