Tailoring Josephson coupling through superconductivity-induced nonequilibrium.
The distinctive quasiparticle distribution existing under nonequilibrium in a superconductor-insulator-normal metal-insulator-superconductor mesoscopic line is proposed as a novel tool to control the supercurrent intensity in a long Josephson weak link. We present a description of this system in the framework of the diffusive-limit quasiclassical Green-function theory and take into account the effects of inelastic scattering with arbitrary strength. Supercurrent enhancement and suppression, including a marked transition to a pi junction, are striking features leading to a fully tunable structure.
Giazotto
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NEST-INFM & Scuola Normale Superiore, I-56126 Pisa, Italy. giazotto@sns.it
Heikkilä
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Taddei
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Fazio
Rosario
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Pekola
J P
JP
Beltram
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