Title
Correlation between characteristic energies in non-s-wave pairing superconductors Correlation between characteristic energies in non-s-wave pairing superconductors
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Source (journal)
Physics letters: A. - Amsterdam, 1967, currens
Volume/pages
322(2004) :5-6 , p. 375-383
ISSN
0375-9601
ISI
000220123600017
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
By solution of the Bethe-Goldstone equation for the Cooper pairing problem, an approximate analytic relation is derived between coherence length xi and the binding energy of the Cooper pair. This relation is then qualitatively confirmed by numerically solving the corresponding self-consistent gap equations, following the crossover from weak to strong coupling, in non-s-wave superconductors. The relation applies to non-conventional superconductors, and in particular to heavy Fermions and to high-T-c cuprates. Utilizing in addition a phenomenological link between k(B)T(c) and a characteristic energy epsilon(c) = h(2)/2m* xi(2), with m* the effective mass, major differences are exposed in the functional relation between k(B)T(c) and epsilon(c) for s-wave materials and for non-conventional superconductors. The relation between critical temperature and epsilon(c) thereby proposed correctly reflects the qualitative properties of heavy Fermion superconductors. (C) 2004 Elsevier B.V. All rights reserved.
E-info
https://repository.uantwerpen.be/docman/iruaauth/c9b68b/f096589.pdf
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