On the Lifshitz tail in the density of states of a superconductor with magnetic impurities

Details On the Lifshitz tail in the density of states of a superconductor with magnetic impurities On the Lifshitz tail in the density of states of a superconductor with magnetic impurities

1997-05-09

arxiv.org/abs/cond-mat/9705093v1

Physics

Condensed Matter

Superconductivity

4 pages, uuencoded latex file + ps figure files

Scientific paper

10.1103/PhysRevLett.79.3767

We argue that any superconductor with magnetic impurities is gapless due to
a Lifshitz tail in the density of states extending to zero energy. At low
energy the density of states $\nu(E \to 0)$ remains finite. We show that
fluctuations in the impurity distribution produce regions of suppressed
superconductivity, which are responsible for the low energy density of states.

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