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Electronic structure of the quenched superconductivity materials Y/sub 1-x/Pr/sub x/Ba/sub 2/Cu/sub 3/O/sub 7-delta [electronic resource].

Published
Los Alamos, N.M. : Los Alamos National Laboratory, 1988.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
Pages: 21 : digital, PDF file
Additional Creators
Los Alamos National Laboratory and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
The superconductivity of the Y/sub 1-x/Pr/sub x/Ba/sub 2/Cu/sub 3/O/sub 7-delta/ system is quenched as x increases. It has been speculated that Pr has valence 4+, resulting in extra charge in the Cu-O planes, and causing T/sub c/-quenching. To study the Pr electronic state, we have measured valence band resonant photoemission of the Y/sub 1-x/Pr/sub x/Ba/sub 2/Cu/sub 3/O/sub 7- delta/ system for x = 0, 0.2, 0.4, 0.6, 0.8, and 1.0. We find that the Pr valence is close to 3+ for all x and that the extracted Pr 4f spectral weight has a complex lineshape, implying extensive Pr 4f/O 2p hybridization which probably causes the T/sub c/-quenching by disrupting the electronic or magnetic structure of the x = 0 material, perhaps via a Pr-Cu superexchange interaction. 36 refs., 4 figs.
Report Numbers
E 1.99:la-ur-88-2112
E 1.99: conf-880914-2
conf-880914-2
la-ur-88-2112
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Note
Published through SciTech Connect.
01/01/1988.
"la-ur-88-2112"
" conf-880914-2"
"DE88014414"
18. rare earth research conference, Lake Geneva, WI, USA, 11 Sep 1988.
Allen, J.W.; Ellis, W.P.; Lee, B.W.; Spicer, W.E.; Maple, M.B.; Yeh, J.J.; Shen, Z.X.; Kang, J.S.; Lindau, I.
Funding Information
W-7405-ENG-36
View MARC record | catkey: 14065127