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28 March 2024
 
  » pubmed » pmid12785919

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Andreev reflections on Y(1-x)Ca(x)Ba(2)Cu(3)O(7-delta): evidence for an unusual proximity effect
A Kohen ; G Leibovitch ; G Deutscher ;
Date 23 May 2003
Journal Phys Rev Lett, 90 (20), 207005
AbstractWe have measured Andreev reflections between an Au tip and Y(1-x)Ca(x)Ba(2)Cu(3)O(7-delta) thin films in the in-plane orientation. The conductance spectra are best fitted with a pair potential having the d(x2-y2)+is symmetry. We find that the amplitude of the is component is enhanced as the contact transparency is increased. This is an indication for an unusual proximity effect that modifies the pair potential in the superconductor near the surface with the normal metal.
Source PubMed, pmid12785919
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