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On the analysis of tunneling data for A15 superconductors

On the analysis of tunneling data for A15 superconductors We examine the applicability of the standard McMillan inversion of Eliashberg's equations for superconductors with a nonconstant electronic density of statesN(ε). We do this usign simple models forN(ε) and a realistically shapedN(ε) taken from recent band structure work for Nb3Sn. It turns out that peak structure inN(ε) near εF may lead to gross errors in the derived Eliashberg function α2F(θ) when the energy dependence ofN(ε) is omitted in the inversion procedure. For Nb3Sn, this leads to a 40% overestimate of λ when α2F(θ) is evaluated via the standard McMillan program. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Low Temperature Physics Springer Journals

On the analysis of tunneling data for A15 superconductors

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References (8)

Publisher
Springer Journals
Copyright
Copyright
Subject
Physics; Condensed Matter Physics; Characterization and Evaluation of Materials; Magnetism, Magnetic Materials
ISSN
0022-2291
eISSN
1573-7357
DOI
10.1007/BF00655440
Publisher site
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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(ε). We do this usign simple models forN(ε) and a realistically shapedN(ε) taken from recent band structure work for Nb3Sn. It turns out that peak structure inN(ε) near εF may lead to gross errors in the derived Eliashberg function α2F(θ) when the energy dependence ofN(ε) is omitted in the inversion procedure. For Nb3Sn, this leads to a 40% overestimate of λ when α2F(θ) is evaluated via the standard McMillan program.

Journal

Journal of Low Temperature Physics – Springer Journals

Published: Nov 2, 2004

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