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arXiv · 0810.3980

Competition between electronic cooling and Andreev dissipation in a superconducting micro-cooler

Sukumar Rajauria·Philippe Gandit·F. W. J. Hekking·Bernard Pannetier·Hervé Courtois
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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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Sukumar Rajauria, Philippe Gandit, F. W. J. Hekking, Bernard Pannetier, Hervé Courtois. 2009-02-07. Competition between electronic cooling and Andreev dissipation in a superconducting micro-cooler. https://doi.org/10.1007/s10909-009-9864-4

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