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Coherent low-energy charge transport in a diffusive S-N-S junction

P. Dubos·H. Courtois·O. Buisson·B. Pannetier
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Abstract

We have studied the current voltage characteristics of diffusive mesoscopic Nb-Cu-Nb Josephson junctions with highly-transparent Nb-Cu interfaces. We consider the low-voltage and high-temperature regime eV<ε_{c}<k_{B}T where epsilon_{c} is the Thouless energy. The observed excess current as well as the observed sub-harmonic Shapiro steps under microwave irradiation suggest the occurrence of low-energy coherent Multiple Andreev Reflection (MAR).

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P. Dubos, H. Courtois, O. Buisson, B. Pannetier. 2001-10-29. Coherent low-energy charge transport in a diffusive S-N-S junction. https://doi.org/10.1103/physrevlett.87.206801

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