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TT: Fachverband Tiefe Temperaturen

TT 99: Poster Session: Transport

TT 99.31: Poster

Thursday, March 15, 2018, 15:00–19:00, Poster B

Correlation-induced refrigeration with superconducting single-electron transistors — •Rafael Sánchez — Universidad Autónoma de Madrid

The model of a superconducting tunnel junction is presented which refrigerates a nearby metallic island without any particle exchange. Heat extraction is mediated by charge fluctuations in the coupling capacitance of the two systems. The interplay of Coulomb interaction and the superconducting gap reduces the power consumption of the refrigerator. The island is predicted to be cooled down to temperatures close to 50 mK, for realistic parameters [1]. The results emphasize the role of non-equilibrium correlations in bipartite mesoscopic conductors. This mechanism can be applied to create local temperature gradients in tunnel junction arrays.
R. Sánchez, Appl. Phys. Lett. 111, 223103 (2017).