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Suppression and enhancement of the critical current in multiterminal S/N/S mesoscopic structures

R. Seviour·A. F. Volkov
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Abstract

We analyse the measured critical current $I_{m\text{}}$ in a mesoscopic 4-terminal S/N/S structure. The current through the S/N interface is shown to consist not only of the Josephson component $I_{c}\sin ϕ,$ but also a phase-coherent part $I_{sg}\cos ϕ$ of the subgap current. The current $I_{m}$ is determined by the both components $I_{c}$ and $I_{sg},$ and depends in a nonmonotonic way on the voltage $V$ between superconductors and normal reservoirs reaching a maximum at $V\cong Δ/e$. The obtained theoretical resultas are in qualitative agreement with recent experimental data.

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R. Seviour, A. F. Volkov. 2000-02-14. Suppression and enhancement of the critical current in multiterminal S/N/S mesoscopic structures. https://doi.org/10.1103/physrevb.61.r9273

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