Spin heat accumulation and its relaxation in spin valves
arXiv:0910.4867 · doi:10.1103/PhysRevB.81.100408
Abstract
We study the concept of spin heat accumulation in excited spin valves, more precisely the effective electron temperature that may become spin dependent, both in linear response and far from equilibrium. A temperature or voltage gradient create non-equilibrium energy distributions of the two spin ensembles in the normal metal spacer, which approach Fermi-Dirac functions through energy relaxation mediated by electron-electron and electron-phonon coupling. Both mechanisms also exchange energy between the spin subsystems. This inter-spin energy exchange may strongly affect thermoelectric properties spin valves, leading, e.g., to violations of the Wiedemann-Franz law.
4 pages, 4 figures, close to published version
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- Spin Seebeck Power Conversion
- Local Temperatures Out of Equilibrium
- Spin caloritronics with superconductors: Enhanced thermoelectric effects, generalized Onsager response-matrix, and thermal spin currents
- Thermal spin transport and spin-orbit interaction in ferromagnetic/non-magnetic metals
- Polarized heat current generated by quantum pumping in two-dimensional topological insulators
- Spin heat accumulation induced by tunneling from a ferromagnet
- Comparison between thermal and current driven spin-transfer torque in nanopillar metallic spin valves
- Electron-electron interaction induced spin thermalization in quasi-low-dimensional spin valves
- Non-equilibrium Magnon Engineering Enabling Significant Thermal Transport Modulation
- Non-universal shot noise in quasiequilibrium spin valves
- Spin accumulation induced by a singlet supercurrent
- Seebeck Effect in Nanomagnets
- Evidence for spin-dependent energy transport in a superconductor