Phase-dependent heat transport through magnetic Josephson tunnel junctions

F. S. Bergeret; F. Giazotto

doi:10.1103/PhysRevB.88.014515

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Phase-dependent heat transport through magnetic Josephson tunnel junctions

F. S. Bergeret, F. Giazotto

DOI 10.1103/PhysRevB.88.014515 · Physical Review B

T1

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Abstract

We present an exhaustive study of the coherent heat transport through superconductor-ferromagnet (SF) Josephson junctions including a spin-filter (Isf) tunneling barrier. By using the quasiclassical Keldysh Green's function technique we derive a general expression for the heat current flowing through a SF-Isf-FS junction and analyze the dependence of the thermal conductance on the spin-filter efficiency, the phase difference between the superconductors and the magnetization direction of the ferromagnetic layers. In the case of noncollinear magnetizations we show explicitly the contributions to the heat current stemming from the singlet and triplet components of the superconducting condensate. We also demonstrate that the magnetothermal resistance ratio of a SF-Isf-FS heat valve can be increased by the spin-filter effect under suitable conditions.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
NbN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
GdN Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown