Ballistic Josephson junctions in the presence of generic spin dependent fields

Physical Review B 94, 014515 (2016)

Ballistic Josephson junctions in the presence of generic spin dependent fields

F. Konschelle, I. V. Tokatly, F. S. Bergeret

Ballistic Josephson junctions are studied in the presence of a spin-splitting field and spin-orbit coupling. A generic expression for the quasiclassical Green's function is obtained and with its help we analyze several aspects of the proximity effect between a spin-textured normal metal (N) and singlet superconductors (S). In particular, we show that the density of states may show a zero-energy peak which is a generic consequence of the spin dependent couplings in heterostructures. In addition, we also obtain the spin current and the induced magnetic moment in a SNS structure and discuss possible coherent manipulation of the magnetization which results from the coupling between the superconducting phase and the spin degree of freedom. Our theory predicts a spin accumulation at the S/N interfaces, and transverse spin currents flowing perpendicular to the junction interfaces. Some of these findings can be understood in the light of a non-Abelian electrostatics.

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http://dx.doi.org/10.1103/PhysRevB.94.014515
arxiv
http://arxiv.org/abs/arXiv:1604.08455

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