Nonconstant electronic density of states tunneling inversion for A15 superconductors: Nb3Sn

Details Nonconstant electronic density of states tunneling inversion for A15 superconductors: Nb3Sn Nonconstant electronic density of states tunneling inversion for A15 superconductors: Nb3Sn

2002-01-04

arxiv.org/abs/cond-mat/0201048v1

Phys.Rev.B65:224510,2002

Physics

Condensed Matter

Superconductivity

11 pages, 11 figures

Scientific paper

10.1103/PhysRevB.65.224510

We re-examine the tunneling data on A15 superconductors by performing a generalized McMillan-Rowell tunneling inversion that incorporates a nonconstant electronic density of states obtained from band-structure calculations. For Nb3Sn, we find that the fit to the experimental data can be slightly improved by taking into account the sharp structure in the density of states, but it is likely that such an analysis alone is not enough to completely explain the superconducting tunneling characteristics of this material. Nevertheless, the extracted Eliashberg function displays a number of features expected to be present for the highest quality Nb3Sn samples.

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