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Title

Predicted very large thermoelectric effect in ferromagnet-superconductor junctions in the presence of a spin-splitting magnetic field

AuthorsOzaeta, A.; Virtanen, P.; Bergeret, F. S. ; Heikkilä, T. T.
Issue Date2014
PublisherAmerican Physical Society
CitationPhysical Review Letters 112(5): 057001 (2014)
AbstractWe 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.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.112.057001
URIhttp://hdl.handle.net/10261/102797
DOIhttp://dx.doi.org/10.1103/PhysRevLett.112.057001
Identifiersdoi: 10.1103/PhysRevLett.112.057001
issn: 0031-9007
e-issn: 1079-7114
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