Efficient electron refrigeration using superconductor/spin-filter devices

• DOI: 10.1063/1.4813599
• Publication Date: 2013-07-15T22:19:06Z
• Authors: Shiro Kawabata; Asier Ozaeta; Andrey S. Vasenko; Frank W. J. Hekking; F. Sebastián Berg...
• Keywords: Superconductivity (cond-mat.supr-con); Condensed Matter - Mesoscale and Nanoscale Physics; Condensed Matter - Superconductivity; Mesoscale and Nanoscale Physics (cond-mat.mes-hall); 0103 physical sciences; FOS: Physical sciences; 01 natural sciences; 7. Clean energy

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 allows for an efficient extraction heat from normal metal. We demonstrate that highly can be realized both ballistic diffusive multi-channel junctions which reduction electron temperature 300 mK around 50 achieved. Our results indicate practical usefulness spin-filters efficiently detectors, sensors, quantum devices.