On the analysis of tunneling data for A15 superconductors |
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Authors: | G Kieselmann H Rietschel |
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Affiliation: | (1) Institut für Angewandte Kernphysik I, Kernforschungszentrum Karlsruhe, Karlsruhe, West Germany |
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Abstract: | We examine the applicability of the standard McMillan inversion of Eliashberg's equations for superconductors with a nonconstant electronic density of statesN(). We do this usign simple models forN() and a realistically shapedN() taken from recent band structure work for Nb3Sn. It turns out that peak structure inN() near F may lead to gross errors in the derived Eliashberg function 2F() when the energy dependence ofN() is omitted in the inversion procedure. For Nb3Sn, this leads to a 40% overestimate of when 2F() is evaluated via the standard McMillan program. |
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