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Re-entrant localization of single particle transport in disordered Andreev wires

N. B. Kopnin·A. S. Mel'nikov·V. M. Vinokur
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Abstract

We study effects of disorder on the low energy single particle transport in a normal wire surrounded by a superconductor. We show that the heat conductance includes the Andreev diffusion decreasing with increase in the mean free path $\ell $ and the diffusive drift produced by a small particle-hole asymmetry, which increases with increasing $\ell$. The conductance thus has a minimum as a function of $\ell$ which leads to a peculiar re-entrant localization as a function of the mean free path.

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N. B. Kopnin, A. S. Mel'nikov, V. M. Vinokur. 2003-09-26. Re-entrant localization of single particle transport in disordered Andreev wires. https://doi.org/10.1103/physrevb.70.075310

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