Heat transport and electron cooling in ballistic normal-metal/spin-filter/superconductor junctions

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:383

Article; Proceedings Paper

Kawabata, Shiro¹  Vasenko, Andrey S.^2,3  Ozaeta, Asier⁴  Bergeret, Sebastian F.^4,5  Hekking, Frank W. J.^2,3 

[1] Natl Inst Adv Ind Sci & Technol, Elect & Photon Res Inst ESPRIT, Tsukuba, Ibaraki 3058568, Japan

[2] Univ Grenoble 1, LPMMC, F-38042 Grenoble, France

[3] CNRS, F-38042 Grenoble, France

[4] Univ Basque Country, CSIC, Ctr Mixto, Ctr Fis Mat CFM MPC, E-20018 San Sebastian, Spain

[5] Donostia Int Phys Ctr, E-20018 San Sebastian, Spain

关键词: Electron cooling;    Superconducting tunnel junction;    Spin filter;    Andreev reflection;    Thermal transport;   

DOI  :  10.1016/j.jmmm.2014.10.032

来源: Elsevier

【 摘 要 】

We investigate electron cooling based on a clean normal-metal/spin-filter/superconductor junction. Due to the suppression of the Andreev reflection by the spin filter effect, the cooling power of the system is found to be extremely higher than that for conventional normal-metal/nonmagnetic-insulator/superconductor coolers. Therefore we can extract large amount of heat from normal metals. Our results strongly indicate the practical usefulness of the spin filter effect for cooling detectors, sensors, and quantum bits. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

Free