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

Autor:	Grein, Roland, Lofwander, Tomas, Eschrig, Matthias
Rok vydání:	2013
Předmět:	Condensed Matter - Superconductivity Condensed Matter - Mesoscale and Nanoscale Physics
Zdroj:	Phys. Rev. B 88, 054502 (2013)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevB.88.054502
Popis:	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. Comment: 12 pages, 9 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1306.0141 Zobrazit plný text záznamu View this record from Arxiv