Suppression and enhancement of the critical current in multiterminal superconductor-normal-metal-superconductor mesoscopic structures

R. Seviour, A. Volkov

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

We analyze the measured critical current Im in a mesoscopic four-terminal superconductor–normal-metal–superconductor (S/N/S) structure. The current through the S/N interface is shown to consist not only of the Josephson component Icsinφ, but also a phase-coherent part Isgcosφ of the subgap current. The current Im is determined by both components Ic and Isg, and depends in a nonmonotonic way on the voltage V between superconductors and normal reservoirs reaching a maximum at V≅Δ/e. The obtained theoretical results are in qualitative agreement with recent experimental data.

Original languageEnglish
Pages (from-to)R9273-R9276
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume61
Issue number14
DOIs
Publication statusPublished - 1 Apr 2000
Externally publishedYes

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