Spin current through a tunnel junction
Mesoscale and Nanoscale Physics
2009-11-10 v1
Abstract
We derive an expression for the spin-current through a tunnel barrier in terms of many-body Green's functions. The spin current has two contributions. One can be associated with angular-momentum transfer by spin-polarized charge currents crossing the junction. If there are magnetic moments on both sides of the tunnel junction, due to spin accumulation or ferromagnetic ordering, then there is a second contribution related to the exchange coupling between the moments.
Keywords
Cite
@article{arxiv.cond-mat/0411562,
title = {Spin current through a tunnel junction},
author = {Matthias Braun and Jürgen König and Jan Martinek},
journal= {arXiv preprint arXiv:cond-mat/0411562},
year = {2009}
}
Comments
5 pages, 1 figure, submitted to Superlattices and Microstructures