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Supercurrent Quantization in Narrow Channel SNS Junctions

Nikolai M. Chtchelkatchev·Gordey B. Lesovik·Gianni Blatter
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Abstract

We determine the quasi-particle excitation spectrum in the normal region of a narrow ballistic superconductor--normal-metal--superconductor (SNS) Josephson contact. Increasing the effective chemical potential in the contact converts the electronic levels into Andreev-levels carrying supercurrent. The opening of these superchannels leads to a supercurrent quantization which exhibits a non-universal behavior in general and we discuss its dependence on the junction parameters.

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Nikolai M. Chtchelkatchev, Gordey B. Lesovik, Gianni Blatter. 1999-07-29. Supercurrent Quantization in Narrow Channel SNS Junctions. https://arxiv.org/abs/cond-mat/9907460

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