Ultra-low dissipation Josephson transistor

Details Ultra-low dissipation Josephson transistor Ultra-low dissipation Josephson transistor

2003-07-29

arxiv.org/abs/cond-mat/0307700v1

Appl. Phys. Lett. 83, 2877 (2003)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures, to appear in Applied Physics Letters

Scientific paper

10.1063/1.1610254

A superconductor-normal metal-superconductor (SNS) transistor based on superconducting microcoolers is presented. The proposed 4-terminal device consists of a long SNS Josephson junction whose N region is in addition symmetrically connected to superconducting reservoirs through tunnel barriers (I). Biasing the SINIS line allows to modify the quasiparticle temperature in the weak link, thus controlling the Josephson current. We show that, in suitable voltage and temperature regimes, large supercurrent enhancements can be achieved with respect to equilibrium, due to electron ``cooling'' generated by the control voltage. The extremely low power dissipation intrinsic to the structure makes this device relevant for a number of electronic applications.

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