Supercurrent-induced temperature gradient across a nonequilibrium SNS Josephson junction

Details Supercurrent-induced temperature gradient across a nonequilibrium SNS Josephson junction Supercurrent-induced temperature gradient across a nonequilibrium SNS Josephson junction

2006-01-20

arxiv.org/abs/cond-mat/0601488v2

Phys. Rev. Lett. 96, 167004 (2006)

Physics

Condensed Matter

Superconductivity

4 pages, 4 figures, corrected typos, added plot to figure 2

Scientific paper

10.1103/PhysRevLett.96.167004

Using tunneling spectroscopy, we have measured the local electron energy distribution function in the normal part of a superconductor-normal metal-superconductor (SNS) Josephson junction containing an extra lead to a normal reservoir. In the presence of simultaneous supercurrent and injected quasiparticle current, the distribution function exhibits a sharp feature at very low energy. The feature is odd in energy, and odd under reversal of either the supercurrent or the quasiparticle current direction. The feature represents an effective temperature gradient across the SNS Josephson junction that is controllable by the supercurrent.

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