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Cooling electrons by magnetic-field tuning of Andreev reflection

F. Giazotto·F. Taddei·M. Governale·C. Castellana·R. Fazio·F. Beltram
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Abstract

A solid-state cooling principle based on magnetic-field-driven tunable suppression of Andreev reflection in superconductor/two-dimensional electron gas nanostructures is proposed. This cooling mechanism can lead to very large heat fluxes per channel up to 10^4 times greater than currently achieved with superconducting tunnel junctions. This efficacy and its availability in a two-dimensional electron system make this method of particular relevance for the implementation of quantum nanostructures operating at cryogenic temperatures.

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F. Giazotto, F. Taddei, M. Governale, C. Castellana, R. Fazio, F. Beltram. 2006-11-09. Cooling electrons by magnetic-field tuning of Andreev reflection. https://doi.org/10.1103/physrevlett.97.197001

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