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RESEARCH PRODUCT

Thermal, electric and spin transport in superconductor/ferromagnetic-insulator structures

Tero T. HeikkiläMikhail SilaevPauli VirtanenPauli VirtanenF. Sebastian BergeretF. Sebastian Bergeret

subject

Superconducting coherence length---FOS: Physical sciencesInsulator (electricity)02 engineering and technology01 natural sciencesSuperconductivity (cond-mat.supr-con)Condensed Matter::Superconductivity0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)SuperconductivityPhysicsCondensed Matter - Materials Science010304 chemical physicsCondensed matter physicsSpintronicsCondensed Matter - Mesoscale and Nanoscale PhysicsCondensed Matter - SuperconductivityMaterials Science (cond-mat.mtrl-sci)Surfaces and InterfacesGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter Physics3. Good healthSurfaces Coatings and FilmsConventional superconductorFerromagnetismDensity of states0210 nano-technologyTransport phenomena

description

A ferromagnetic insulator (FI) attached to a conventional superconductor (S) changes drastically the properties of the latter. Specifically, the exchange field at the FI/S interface leads to a splitting of the superconducting density of states. If S is a superconducting film, thinner than the superconducting coherence length, the modification of the density of states occurs over the whole sample. The co-existence of the exchange splitting and superconducting correlations in S/FI structures leads to striking transport phenomena that are of interest for applications in thermoelectricity, superconducting spintronics and radiation sensors. Here we review the most recent progress in understanding the transport properties of FI/S structures by presenting a complete theoretical framework based on the quasiclassical kinetic equations. We discuss the coupling between the electronic degrees of freedom, charge, spin and energy, under non-equilibrium conditions and its manifestation in thermoelectricity and spin-dependent transport.

yearjournalcountryeditionlanguage
2019-02-21Progress in Surface Science
10.1016/j.progsurf.2019.100540http://dx.doi.org/10.1016/j.progsurf.2019.100540