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arXiv · 0902.2584

Electronic Refrigeration at the Quantum Limit

Andrey V. Timofeev·Meri Helle·Matthias Meschke·Mikko Möttönen·Jukka P. Pekola
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Abstract

We demonstrate quantum limited electronic refrigeration of a metallic island in a low temperature micro-circuit. We show that matching the impedance of the circuit enables refrigeration at a distance, of about 50 um in our case, through superconducting leads with a cooling power determined by the quantum of thermal conductance. In a reference sample with a mismatched circuit this effect is absent. Our results are consistent with the concept of electromagnetic heat transport. We observe and analyze the crossover between electromagnetic and quasiparticle heat flux in a superconductor.

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Andrey V. Timofeev, Meri Helle, Matthias Meschke, Mikko Möttönen, Jukka P. Pekola. 2009-02-16. Electronic Refrigeration at the Quantum Limit. https://doi.org/10.1103/physrevlett.102.200801

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