Two-component model of a spin-polarized transport
Abstract
Effect of the spin-involved interaction of electrons with impurity atoms or defects to the transport properties of a two-dimensional electron gas is described by using a simplifying two-component model. Components representing spin-up and spin-down states are supposed to be coupled at a discrete set of points within a conduction channel. The used limit of the short-range interaction allows to solve the relevant scattering problem exactly. By varying the model parameters different transport regimes of two-terminal devices with ferromagnetic contacts can be described. In a quasi-ballistic regime the resulting difference between conductances for the parallel and antiparallel orientation of the contact magnetization changes its sign as a function of the length of the conduction channel if appropriate model parameters are chosen. The effect is in agreement with recent experimental observations.
Keywords
Cite
@article{arxiv.cond-mat/0005410,
title = {Two-component model of a spin-polarized transport},
author = {P. Seba and P. Exner and K. N. Pichugin and P. Streda},
journal= {arXiv preprint arXiv:cond-mat/0005410},
year = {2007}
}
Comments
4 RevTeX pages with 4 figures