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Title

Efficient electron refrigeration using superconductor/spin-filter devices

AuthorsKawabata, Shiro; Ozaeta, A.; Vasenko, A. S.; Hekking, F. W. J.; Bergeret, F. S.
Issue Date2013
PublisherAmerican Institute of Physics
CitationApplied Physics Letters 103(3): 032602 (2013)
AbstractEfficient 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. © 2013 AIP Publishing LLC.
Publisher version (URL)http://dx.doi.org/10.1063/1.4813599
URIhttp://hdl.handle.net/10261/102140
DOIhttp://dx.doi.org/10.1063/1.4813599
Identifiersdoi: 10.1063/1.4813599
issn: 0003-6951
e-issn: 1077-3118
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