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

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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.

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Pages: (9 p)

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Krol, A.; Ming, Z.H.; Kao, Y.H. (State Univ. of New York, Buffalo, NY (United States). Dept. of Physics); Nuecker, N.; Roth, G.; Fink, J. (Kernforschungszentrum Karlsruhe GmbH (Germany). Inst. fuer Nukleare Festkoerperphysik) et al. February 1, 1992.

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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.

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Pages: (9 p)

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OSTI; NTIS; INIS; GPO Dep.

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  • 5. annual conference on superconductivity and applications, Buffalo, NY (United States), 24-26 Sep 1991

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  • Other: DE92014687
  • Report No.: BNL-47236
  • Report No.: CONF-9109102--7
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 5230002
  • Archival Resource Key: ark:/67531/metadc1067840

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  • February 1, 1992

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  • Feb. 4, 2018, 10:51 a.m.

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  • April 23, 2018, 12:51 p.m.

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Krol, A.; Ming, Z.H.; Kao, Y.H. (State Univ. of New York, Buffalo, NY (United States). Dept. of Physics); Nuecker, N.; Roth, G.; Fink, J. (Kernforschungszentrum Karlsruhe GmbH (Germany). Inst. fuer Nukleare Festkoerperphysik) et al. Studies of Y-Ba-Cu-O single crystals by x-ray absorption spectroscopy, article, February 1, 1992; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc1067840/: accessed November 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.