Studies of Y-Ba-Cu-O single crystals by x-ray absorption spectroscopy
Conference
·
OSTI ID:10153990
- State Univ. of New York, Buffalo, NY (United States). Dept. of Physics
- Kernforschungszentrum Karlsruhe GmbH (Germany). Inst. fuer Nukleare Festkoerperphysik
- Brookhaven National Lab., Upton, NY (United States)
- Karlsruhe Univ. (T.H.) (Germany). Inst. fuer Kristallchemie
- Eidgenoessische Technische Hochschule, Zurich (Switzerland). Lab. fuer Festkoerperphysik
- Walther-Meissner-Institut fuer Tieftemperaturforschung, Garching (Germany)
The symmetry and density of unoccupied states of YBa{sub 2}Cu{sub 3}O{sub 7} 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 2p holes are distributed equally between the CuO{sub 2} planes and CuO chains and that the partial density of unoccupied O 2p 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. 18 refs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 10153990
- Report Number(s):
- BNL-47236; CONF-9109102-7; ON: DE92014687
- Resource Relation:
- Conference: 5. annual conference on superconductivity and applications,Buffalo, NY (United States),24-26 Sep 1991; Other Information: PBD: Feb 1992
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
74 ATOMIC AND MOLECULAR PHYSICS
YTTRIUM OXIDES
X-RAY SPECTROSCOPY
BARIUM OXIDES
COPPER OXIDES
ABSORPTION SPECTROSCOPY
EXCITED STATES
HIGH-TC SUPERCONDUCTORS
X-RAY SPECTRA
360202
664200
STRUCTURE AND PHASE STUDIES
SPECTRA OF ATOMS AND MOLECULES AND THEIR INTERACTIONS WITH PHOTONS
74 ATOMIC AND MOLECULAR PHYSICS
YTTRIUM OXIDES
X-RAY SPECTROSCOPY
BARIUM OXIDES
COPPER OXIDES
ABSORPTION SPECTROSCOPY
EXCITED STATES
HIGH-TC SUPERCONDUCTORS
X-RAY SPECTRA
360202
664200
STRUCTURE AND PHASE STUDIES
SPECTRA OF ATOMS AND MOLECULES AND THEIR INTERACTIONS WITH PHOTONS