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arXiv · 1307.2318

Efficient electron refrigeration using superconductor/spin-filter devices

Shiro Kawabata·Asier Ozaeta·Andrey S. Vasenko·Frank W. J. Hekking·F. Sebastian Bergeret
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Abstract

Efficient electron-refrigeration based on a normal-metal/spin-filter/superconductor junction is proposed and demonstrated theoretically. The spin-filtering effect leads to values of the cooling power much higher than in conventional normal-metal/nonmagnetic-insulator/superconductor coolers and allows for an efficient extraction of heat from the normal metal. We demonstrate that highly efficient cooling can be realized in both ballistic and diffusive multi-channel junctions in which the reduction of the electron temperature from 300 mK to around 50 mK can be achieved. Our results indicate the practical usefulness of spin-filters for efficiently cooling detectors, sensors, and quantum devices.

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Shiro Kawabata, Asier Ozaeta, Andrey S. Vasenko, Frank W. J. Hekking, F. Sebastian Bergeret. 2013-07-09. Efficient electron refrigeration using superconductor/spin-filter devices. https://doi.org/10.1063/1.4813599

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