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Título: | Predicted very large thermoelectric effect in ferromagnet-superconductor junctions in the presence of a spin-splitting magnetic field |
Autor: | Ozaeta, A. CSIC; Virtanen, Pauli; Bergeret, F. S. CSIC ORCID; Heikkilä, T. T. | Fecha de publicación: | 2014 | Editor: | American Physical Society | Citación: | Physical Review Letters 112(5): 057001 (2014) | Resumen: | We show that a huge thermoelectric effect can be observed by contacting a superconductor whose density of states is spin split by a Zeeman field with a ferromagnet with a nonzero polarization. The resulting thermopower exceeds kB/e by a large factor, and the thermoelectric figure of merit ZT can far exceed unity, leading to heat engine efficiencies close to the Carnot limit. We also show that spin-polarized currents can be generated in the superconductor by applying a temperature bias. © 2014 American Physical Society. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.112.057001 | URI: | http://hdl.handle.net/10261/102797 | DOI: | 10.1103/PhysRevLett.112.057001 | Identificadores: | doi: 10.1103/PhysRevLett.112.057001 issn: 0031-9007 e-issn: 1079-7114 |
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Spin-Splitting Magnetic Field.pdf | 446,07 kB | Adobe PDF | Visualizar/Abrir |
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