Manifestly Non-Gaussian Fluctuations in Superconductor-Normal Metal Tunnel Nanostructures

M. A. Laakso, T. T. Heikkilä, and Yuli V. Nazarov
Phys. Rev. Lett. 108, 067002 – Published 8 February 2012

Abstract

We propose a mesoscopic setup which exhibits strong and manifestly non-Gaussian fluctuations of energy and temperature when suitably driven out of equilibrium. The setup consists of a normal metal island (N) coupled by tunnel junctions (I) to two superconducting leads (S), forming a SINIS structure, and is biased near the threshold voltage for quasiparticle tunneling, eV2Δ. The fluctuations can be measured by monitoring the time-dependent electric current through the system. This makes the setup suitable for the realization of feedback schemes which can be used to stabilize the temperature to the desired value.

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  • Received 1 November 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.067002

© 2012 American Physical Society

Authors & Affiliations

M. A. Laakso1,*, T. T. Heikkilä1, and Yuli V. Nazarov2

  • 1Low Temperature Laboratory, Aalto University, Post Office Box 15100, FI-00076 Aalto, Finland
  • 2Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ Delft, The Netherlands

  • *matti.laakso@aalto.fi

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Issue

Vol. 108, Iss. 6 — 10 February 2012

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