Nonlinear thermoelectric effects in high-field superconductor-ferromagnet tunnel junctions.

ABSTRACT: Background: Thermoelectric effects result from the coupling of charge and heat transport and can be used for thermometry, cooling and harvesting of thermal energy. The microscopic origin of thermoelectric effects is a broken electron-hole symmetry, which is usually quite small in metal structures. In addition, thermoelectric effects decrease towards low temperatures, which usually makes them vanishingly small in metal nanostructures in the sub-Kelvin regime. Results: We report on a combined experimental and theoretical investigation of thermoelectric effects in superconductor/ferromagnet hybrid structures. We investigate the dependence of thermoelectric currents on the thermal excitation, as well as on the presence of a dc bias voltage across the junction. Conclusion:

SUBMITTER: Kolenda S 

PROVIDER: S-EPMC5238697 | biostudies-literature | 2016

REPOSITORIES: biostudies-literature