SKM 2023 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 20: Superconductivity: Tunnelling and Josephson Junctions
TT 20.10: Talk
Tuesday, March 28, 2023, 12:00–12:15, HSZ 103
Complete magnetic control over the superconducting thermoelectric effect — •Jabir Ali Ouassou1, César González-Ruano2, Diego Caso2, Farkhad G. Aliev2, and Jacob Linder1 — 1Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway — 2Departamento Física de la Materia Condensada C-III, INC and IFIMAC, Universidad Autónoma de Madrid, Madrid 28049, Spain
Giant thermoelectric effects are known to arise at the interface between a superconductor and strongly polarized ferromagnet, and this enables the construction of efficient thermoelectric generators. We predict that the thermopower of such generators can be completely controlled by a magnetic input signal: not only can the thermopower be toggled on and off by rotating a magnet, but even the sign of the thermopower can be reversed. This in situ control diverges from conventional thermoelectrics, where the thermopower is usually fixed by the device design.