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Impurity band in clean superconducting weak links

N. B. Kopnin

DOI 10.1103/PhysRevB.65.132503 · Physical Review B

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Abstract

Weak impurity scattering produces a narrow band with a finite density of states near the phase difference φ=π in the midgap energy spectrum of a macroscopic superconducting weak link. The equivalent distribution of transmission coefficients of various conducting quantum channels is found.

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