Tail states in superconductors with weak magnetic impurities

Details Tail states in superconductors with weak magnetic impurities Tail states in superconductors with weak magnetic impurities

2002-10-18

arxiv.org/abs/cond-mat/0210421v2

Physica B v.329-333, p. 1446 (2003)

Physics

Condensed Matter

Superconductivity

2 pages, to appear in Proceedings of LT-23; (v2) some affiliations changed

Scientific paper

We analyse the behavior of the density of states in a singlet s-wave superconductor with weak magnetic impurities in the clean limit by using the method of optimal fluctuation. We show that the density of states varies as $\ln N(E)\propto -|E-\Delta_0|^{(7-d)/4}$ near the mean field gap edge $\Delta_0$ in a d-dimensional superconductor. The optimal fluctuation in d>1 is strongly anisotropic. We compare the density of states with that obtained in other recent approaches.

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