Supercurrent-induced Peltier-like effect in superconductor/normal-metal weak links
Tero T. Heikkilä, Tommy Vänskä, Frank K. Wilhelm
DOI 10.1103/PhysRevB.67.100502 · Physical Review B
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Abstract
The local nonequilibrium quasiparticle distribution function in a normal-metal wire depends on the applied voltage over the wire and the type and strength of different scattering mechanisms. We show that in a setup with superconducting reservoirs, in which the supercurrent and the dissipative current flow (anti) parallel, the distribution function can also be tuned by applying a supercurrent between the contacts. Unlike the usual control by voltage or temperature, this leads to a Peltier-like effect: the supercurrent converts an externally applied voltage into a difference in the effective temperature between two parts of the system maintained at the same potential. We suggest an experimental setup for probing this phenomenon and mapping out the controlled distribution function.
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