The Mesoscopic SNS Transistor

Details The Mesoscopic SNS Transistor The Mesoscopic SNS Transistor

1998-03-09

arxiv.org/abs/cond-mat/9803091v1

Physics

Condensed Matter

Superconductivity

4 Pages including 5 encapsulated postscript figures; submitted to Phys. Rev. Lett

Scientific paper

In a mesoscopic superconductor - normal metal - superconductor (SNS) heterostructure the quasiparticle distribution can be driven far from equilibrium by a voltage applied across the normal metal. This reduces the supercurrent between the superconducting electrodes, which creates the possibility to use these SNS junctions as fast switches and transistors. We describe the system in the framework of the quasiclassical theory and find good agreement with recent experiments. We propose further experimental tests, for instance the voltage-dependence of the current-phase-relation, which includes a transition to a $\pi$-junction.

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