Nonequilibrium and proximity effects in superconductor–normal metal junctions

V. J. Kauppila, H. Q. Nguyen, and T. T. Heikkilä
Phys. Rev. B 88, 075428 – Published 21 August 2013

Abstract

We study the consequences of nonequilibrium heating and inverse proximity effect in normal metal–insulator–superconductor–insulator–normal metal (NISIN) junctions with a simple quasi-one-dimensional model. We especially focus on observables and parameter regions that are of interest in the design of SINIS coolers with quasiparticle traps. We present numerical results calculated by solving the Usadel equation and also present analytical approximations in two limiting cases: a short junction with a non-negligible resistance in both ends and a long junction with a transparent contact at one end.

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  • Received 2 April 2013

DOI:https://doi.org/10.1103/PhysRevB.88.075428

©2013 American Physical Society

Authors & Affiliations

V. J. Kauppila1,*, H. Q. Nguyen1, and T. T. Heikkilä1,2

  • 1O.V. Lounasmaa Laboratory, Aalto University, P.O. Box 15100, FI-00076 AALTO, Finland
  • 2Nanoscience center, Department of physics, P.O. Box 23 (YFL), FI-40014 University of Jyväskylä, Jyväskylä, Finland

  • *ville.kauppila@aalto.fi

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Vol. 88, Iss. 7 — 15 August 2013

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