| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 10643699 | Superlattices and Microstructures | 2005 | 4 Pages |
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 possible contributions. One is associated with angular momentum transfer due to spin-polarized charge current 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.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Matthias Braun, Jürgen König, Jan Martinek,