Phase-tunable colossal magneto-heat resistance in ferromagnetic Josephson thermal valves
arXiv:1211.6570 · doi:10.1063/1.4800578
Abstract
We propose a heat valve based on the interplay between thermal transport and proximity-induced exchange splitting in Josephson tunnel junctions. We demonstrate that the junction heat conductance strongly depends on the relative alignment of the exchange fields induced in the superconductors. Colossal magneto-heat resistance ratios as large as 10^7% are predicted to occur under proper temperature and phase conditions, as well as suitable ferromagnet-superconductor combinations. Moreover, the quantum phase tailoring, intrinsic to the Josephson coupling, offers an additional degree of freedom for the control of the heat conductance. Our predictions for the phase-coherent and spin-dependent tuning of the thermal flux can provide a useful tool for heat management at the nanoscale.
arXiv comment4.5 pages, 3 color figures
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- Efficient phase-tunable Josephson thermal rectifier
- Ferromagnetic insulator-based superconducting junctions as sensitive electron thermometers
- Fingerprint of topological Andreev bound states in phase-dependent heat transport
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- Phase-coherent caloritronics with ordinary and topological Josephson junctions
- Electronic heat current rectification in hybrid superconducting devices
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- Quasiparticle density of states and triplet correlations in superconductor/ferromagnetic-insulator structures across a sharp domain wall
- thermal Josephson junction
- Mesoscopic Josephson junctions with switchable current-phase relation
- Andreev spectrum of a Josephson junction with spin-split superconductors
- Reconstruction of the DOS at the end of a S/F bilayer