Spin-dependent thermoelectric effects in superconductor/ferromagnet hybrid structures
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BECKMANN, D., KOLENDA, S., HEIDRICH, J., WOLF, M., SÜRGERS, C.. Spin-dependent thermoelectric effects in superconductor/ferromagnet hybrid structures. In: NANO-2019: Limits of Nanoscience and Nanotechnologies, Ed. 2019, 24-27 septembrie 2019, Chişinău. Chișinău, Republica Moldova: 2019, p. 36.
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NANO-2019: Limits of Nanoscience and Nanotechnologies 2019
Conferința "SPINTECH Summer school “S/F Hybrid Structures for Spintronics”"
2019, Chişinău, Moldova, 24-27 septembrie 2019

Spin-dependent thermoelectric effects in superconductor/ferromagnet hybrid structures


Pag. 36-36

Beckmann D.1, Kolenda S.1, Heidrich J.1, Wolf M.1, Sürgers C.2
 
1 Karlsruhe Institute of Technology, Institute of Nanotechnology,
2 Karlsruhe Institute of Technology (KIT), Physikalisches Institut
 
 
Disponibil în IBN: 23 ianuarie 2020


Rezumat

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. The thermoelectric signals can be further enhanced by an exchange splitting induced by the proximity effect with a ferromagnetic insulator. Nonlocal thermoelectric effects elucidate the coupling of spin and heat transport in high-field superconductors.