Absorption of Heat into a Superconductor–Normal Metal–Superconductor Junction from a Fluctuating Environment

J. Voutilainen, P. Virtanen, and T. T. Heikkilä
Phys. Rev. Lett. 109, 067002 – Published 7 August 2012
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Abstract

We study a diffusive superconductor-normal–metal-superconductor junction in an environment with intrinsic incoherent fluctuations which couple to the junction through an electromagnetic field. When the temperature of the junction differs from that of the environment, this coupling leads to an energy transfer between the two systems, taking the junction out of equilibrium. We describe this effect in the linear response regime and show that the change in the supercurrent induced by this coupling leads to qualitative changes in the current-phase relation and, for a certain range of parameters, an increase in the critical current of the junction. In addition to normal metals, similar effects can be expected also in other conducting weak links.

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  • Received 17 February 2012

DOI:https://doi.org/10.1103/PhysRevLett.109.067002

© 2012 American Physical Society

Authors & Affiliations

J. Voutilainen1, P. Virtanen2, and T. T. Heikkilä1

  • 1Low Temperature Laboratory, Aalto University, P.O. Box 15100, FI-00076 AALTO, Finland
  • 2Institute for Theoretical Physics and Astrophysics, University of Würzburg, D-97074 Würzburg, Germany

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Issue

Vol. 109, Iss. 6 — 10 August 2012

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