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arXiv · 1306.0141

Inverse proximity effect and influence of disorder on triplet supercurrents in strongly spin-polarized ferromagnets

Roland Grein·Tomas Lofwander·Matthias Eschrig
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Abstract

We discuss the Josephson effect in strongly spin-polarized ferromagnets where triplet correlations are induced by means of spin-active interface scattering, extending our earlier work [Phys. Rev. Lett. 102, 227005 (2009)] by including impurity scattering in the ferromagnetic bulk and the inverse proximity effect in a fully self-consistent way. Our quasiclassical approach accounts for the differences of Fermi momenta and Fermi velocities between the two spin bands of the ferromagnet, and thereby overcomes an important short-coming of previous work within the framework of Usadel theory. We show that non-magnetic disorder in conjunction with spin-dependent Fermi velocities may induce a reversal of the spin-current as a function of temperature.

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Roland Grein, Tomas Lofwander, Matthias Eschrig. 2013-06-01. Inverse proximity effect and influence of disorder on triplet supercurrents in strongly spin-polarized ferromagnets. https://doi.org/10.1103/physrevb.88.054502

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