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Tailoring Josephson coupling through superconductivity-induced nonequilibrium

F. Giazotto, T. T. Heikkila, F. Taddei, Rosario Fazio, J. P. Pekola, F. Beltram

cond-mat.mes-hallarXiv:cond-mat/0311384

Abstract

The distinctive quasiparticle distribution existing under nonequilibrium in a superconductor-insulator-normal metal-insulator-superconductor (SINIS) 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 π-junction are striking features leading to a fully tunable structure.

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