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X-ray absorption studies of La/sub 2-//sub x/(Ba,Sr)/sub x/CuO/sub 4/ superconductors

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
X-ray absorption spectroscopy has been used to study superconducting compounds with the composition La/sub 2-//sub x/(Ba,Sr)/sub x/CuO/sub 4/ for x = 0 to 0.3 X-ray absorption measurements at the Cu K edge indicate that the copper valence is 2+ for all dopant concentrations, and that the mean square relative displacements for Cu-O nearest neighbors are approximately the same for all compositions, with an average characteristic temperature of 570 +- 30 K. Measurements at the La L/sub 3/ edge suggest that the number of empty states near the Fermi energy with O 2p character increases with dopant concentration.
Research Organization:
Brookhaven National Laboratory, Upton, New York 11973
OSTI ID:
6089629
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 35:13; ISSN PRBMD
Country of Publication:
United States
Language:
English

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