Suppression and enhancement of the critical current in multiterminal superconductor–normal-metal–superconductor mesoscopic structures
R. Seviour, A. F. Volkov
DOI 10.1103/PhysRevB.61.R9273 · Physical Review B
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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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nb/Au/Nb Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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