Competition between electronic cooling and Andreev dissipation in a superconducting micro-cooler
Superconductivity
2009-11-13 v2
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.
Cite
@article{arxiv.0810.3980,
title = {Competition between electronic cooling and Andreev dissipation in a superconducting micro-cooler},
author = {Sukumar Rajauria and Philippe Gandit and F. W. J. Hekking and Bernard Pannetier and Hervé Courtois},
journal= {arXiv preprint arXiv:0810.3980},
year = {2009}
}