6533b85efe1ef96bd12bf4bc
RESEARCH PRODUCT
Thermalization of hot electrons via interfacial electron-magnon interaction
Tero T. HeikkiläSubrata ChakrabortySubrata Chakrabortysubject
magneettiset ominaisuudetMaterials scienceelectron relaxationBand gapFOS: Physical sciences02 engineering and technologyElectronsuperconductors7. Clean energy01 natural sciencesmagnonssuprajohteetMagnetization0103 physical sciencesMesoscale and Nanoscale Physics (cond-mat.mes-hall)Proximity effect (superconductivity)010306 general physicsComputer Science::DatabasesSuperconductivityCondensed matter physicsCondensed Matter - Mesoscale and Nanoscale PhysicsMagnonConductance021001 nanoscience & nanotechnologyFerromagnetismtransport phenomenalämmön johtuminenCondensed Matter::Strongly Correlated Electrons0210 nano-technologydescription
Recent work on layered structures of superconductors (S) or normal metals (N) in contact with ferromagnetic insulators (FI) has shown how the properties of the previous can be strongly affected by the magnetic proximity effect due to the static FI magnetization. Here we show that such structures can also exhibit a new electron thermalization mechanism due to the coupling of electrons with the dynamic magnetization, i.e., magnons in FI. We here study the heat flow between the two systems and find that in thin films the heat conductance due to the interfacial electron-magnon collisions can dominate over the well-known electron-phonon coupling below a certain characteristic temperature that can be straightforwardly reached with present-day experiments. We also study the role of the magnon band gap and the induced spin-splitting field induced in S on the resulting heat conductance and show that heat balance experiments can reveal information about such quantities in a way quite different from typical magnon spectroscopy experiments. peerReviewed
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-04-11 |