Speaker
Detlef Beckmann
(KIT, Institute of Nanotechnology)
Description
We report on the experimental observation of spin-dependent thermoelectric effects in superconductor-ferromagnet tunnel junctions in high magnetic fields. The thermoelectric signals are due to a spin-dependent lifting of particle-hole symmetry on the energy scale of the superconducting gap. Due to the small energy scale, the thermoelectric effects can be quite large, and we infer a maximum Seebeck coefficient of about 100 µV/K from our data. Nonlocal thermoelectric effects elucidate the coupling of spin and heat transport in high-field superconductors.
