Theory of electrical spin injection: Tunnel contacts as a solution of the conductivity mismatch problem
Mesoscale and Nanoscale Physics
2009-10-31 v1 Materials Science
Abstract
Theory of electrical spin injection from a ferromagnetic (FM) metal into a normal (N) conductor is presented. We show that tunnel contacts (T) can dramatically increase spin injection and solve the problem of the mismatch in the conductivities of a FM metal and a semiconductor microstructure. We also present explicit expressions for the spin-valve resistance of FM-T-N- and FM-T-N-T-FM-junctions with tunnel contacts at the interfaces and show that the resistance includes both positive and negative contributions (Kapitza resistance and injection conductivity, respectively).
Keywords
Cite
@article{arxiv.cond-mat/0010473,
title = {Theory of electrical spin injection: Tunnel contacts as a solution of the conductivity mismatch problem},
author = {E. I. Rashba},
journal= {arXiv preprint arXiv:cond-mat/0010473},
year = {2009}
}
Comments
4 pages, to appear in Phys. Rev. B (rapid communications)