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Hole filling and pair breaking by Pr ions in YBa sub 2 Cu sub 3 O sub 6. 95+0. 02

Journal Article · · Physical Review Letters; (USA)
; ; ;  [1]
  1. Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, California 92093 (US)

Measurements of the superconducting critical temperature {ital T}{sub {ital c}} are reported for the (Y{sub 1{minus}{ital x}{minus}{ital y}}Ca{sub {ital y}})Pr{sub {ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} system as a function of {ital x} and {ital y}. The {ital T}{sub {ital c}} vs {ital c} curves at fixed values of {ital x} can be resolved into two contributions: (1) the counteracting effects of generation and filling of holes in the CuO{sub 2} sheets by Ca{sup 2+} and Pr{sup 4+} ions, respectively, and (2) the depairing of superconducting electrons via exchange scattering of the mobile holes in the CuO{sub 2} sheets by the Pr magnetic moments.

OSTI ID:
5147828
Journal Information:
Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 63:22; ISSN PRLTA; ISSN 0031-9007
Country of Publication:
United States
Language:
English

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