Abstract
We report on the experimental observation of spin-dependent thermoelectric currents in superconductor-ferromagnet tunnel junctions in high magnetic fields. The thermoelectric signals are due to a spin-dependent lifting of the particle-hole symmetry, and are found to be in excellent agreement with recent theoretical predictions. The maximum Seebeck coefficient inferred from the data is about , much larger than commonly found in metallic structures. Our results directly prove the coupling of spin and heat transport in high-field superconductors.
- Received 18 September 2015
DOI:https://doi.org/10.1103/PhysRevLett.116.097001
© 2016 American Physical Society
Physics Subject Headings (PhySH)
Synopsis
With Heat Comes Current
Published 1 March 2016
Researchers have observed spin-dependent thermoelectric currents in superconductors—a finding that could lead to precise cryogenic thermometers.
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