Scattering theory of magnetic/superconducting junctions with spin active interfaces
Mesoscale and Nanoscale Physics
2011-08-02 v1 Superconductivity
Abstract
We formulate a generalized scattering field theory a la Buttiker describing particles transport in magnetic/superconducting heterostructures. The proposed formalism, characterized by a four- component spinorial wavefunction of the Bogoliubov de Gennes theory, allows to describe the spin flipping phenomena induced by noncollinear magnetizations in the scattering region. As a specific application of the theory, we analyze the conductance, the magnetoresistance and the generation of spin-torque produced by an applied voltage in a spin-valve system. Quantum size effects and quantum beating patterns both in the conductance and in the spin-torque are carefully described.
Cite
@article{arxiv.1107.0819,
title = {Scattering theory of magnetic/superconducting junctions with spin active interfaces},
author = {F. Romeo and R. Citro},
journal= {arXiv preprint arXiv:1107.0819},
year = {2011}
}
Comments
12 pages