Superconducting proximity effect in a diffusive ferromagnet with spin-active interfaces
超导电性
2009-11-11 v2 介观与纳米尺度物理
摘要
We reconsider the problem of the superconducting proximity effect in a diffusive ferromagnet bounded by tunneling interfaces, using spin-dependent boundary conditions. This introduces for each interface a phase-shifting conductance Gphi which results from the spin dependence of the phase shifts acquired by the electrons upon scattering on the interface. We show that Gphi strongly affects the density of states and supercurrents predicted for superconducting/ferromagnetic hybrid circuits. We show the relevance of this effect by identifying clear signatures of Gphi in the data of T. Kontos et al [Phys. Rev. Lett. 86, 304 (2001), ibid. 89, 137007 (2002)].
引用
@article{arxiv.cond-mat/0505403,
title = {Superconducting proximity effect in a diffusive ferromagnet with spin-active interfaces},
author = {Audrey Cottet and Wolfgang Belzig},
journal= {arXiv preprint arXiv:cond-mat/0505403},
year = {2009}
}
备注
submitted to Phys. Rev. Lett