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Competition between Electronic Cooling and Andreev Dissipation in a Superconducting Micro-Cooler

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Abstract

We discuss very low temperature experiments on superconducting micro-coolers made of a double Normal metal–Insulator–Superconductor junction. We investigate with a high resolution the differential conductance of the micro-cooler as well as of additional probe junctions. There is an explicit crossover between the single quasi-particle current and the phase-coherent Andreev current. We establish a thermal model by considering the thermal contribution due to the Andreev current. The related increase of the electron temperature is discussed, including the influence of several parameters like the phase-coherence length or the tunnel junction transparency.

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Authors and Affiliations

  1. Institut Néel, CNRS and Université Joseph Fourier, 25 Avenue des Martyrs, BP 166, 38042, Grenoble, France

    Sukumar Rajauria, P. Gandit, B. Pannetier & H. Courtois

  2. LPMMC, Université Joseph Fourier and CNRS, 25 Avenue des Martyrs, BP 166, 38042, Grenoble, France

    F. W. J. Hekking

  3. Low Temperature Laboratory, Helsinki University of Technology, P.O. Box 3500, 02015 TKK, Espoo, Finland

    H. Courtois

Authors
  1. Sukumar Rajauria
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  2. P. Gandit
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  3. F. W. J. Hekking
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  4. B. Pannetier
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  5. H. Courtois
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Correspondence to H. Courtois.

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Rajauria, S., Gandit, P., Hekking, F.W.J. et al. Competition between Electronic Cooling and Andreev Dissipation in a Superconducting Micro-Cooler. J Low Temp Phys 154, 211–220 (2009). https://doi.org/10.1007/s10909-009-9864-4

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  • DOI: https://doi.org/10.1007/s10909-009-9864-4

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