Phase-tunable colossal magneto-heat resistance in ferromagnetic Josephson thermal valves

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.

4.5 pages, 3 color figures

References in corpus (8)

• Single-mode heat conduction by photons
• The Josephson heat interferometer
• Heat Transistor: Demonstration of Gate-Controlled Electron Refrigeration
• Superconductors as ideal spin sources for spintronics
• Ultrasensitive Proximity Josephson Sensor with Kinetic Inductance Read-Out
• Phase Modulated Thermal Conductance of Josephson Weak Links
• Phase-controlled superconducting heat-flux quantum modulator
• Manipulation and Generation of Supercurrent in Out-of-Equilibrium Josephson Tunnel Nanojunctions

Cited by in corpus (5)

• Revealing the magnetic proximity effect in EuS/Al bilayers through superconducting tunneling spectroscopy
• Electronic heat current rectification in hybrid superconducting devices
• ${\theta }_0$ thermal Josephson junction
• Quasiparticle density of states and triplet correlations in superconductor/ferromagnetic-insulator structures across a sharp domain wall
• Andreev spectrum of a Josephson junction with spin-split superconductors