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Interplay between spin-relaxation and Andreev reflection in ferromagnetic wires with superconducting contacts | | Vladimir I. Fal’ko
; A.F.Volkov
; C.Lambert
; | | Date: |
7 Dec 1998 | | Subject: | Mesoscopic Systems and Quantum Hall Effect; Disordered Systems and Neural Networks | cond-mat.mes-hall cond-mat.dis-nn | | Affiliation: | Lancaster U | | Abstract: | We analyze the change in the resistance of a junction between a diffusive ferromagnetic (F) wire and normal metal electrode, due to the onset of superconductivity (S) in the latter and a double Andreev scattering process leading to a complete internal reflection of a large fraction of the spin-polarized electrons back into the ferromagnet. The superconducting transition results in an additional contact resistance arising from the necessity to match spin-polarized current in F-wire to spin-less current in S-reservoir, which is comparable to the resistance of a piece of a F-wire with the length equal to the spin-relaxation length. | | Source: | arXiv, cond-mat/9901051 | | Services: | Forum | Review | PDF | Favorites | |
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