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 in 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. The role of the degree of nonequilibrium, temperature, and materials choice as well as feature like noise, switching time, and current and power gain are also addressed. PACS numbers: 74.50.+r, 73.12.-b, 74.40.+k.
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