Theory of Transport through Quantum-Dot Spin Valves in the Weak-Coupling Regime
Mesoscale and Nanoscale Physics
2009-11-10 v3
Abstract
We develop a theory of electron transport through quantum dots that are weakly coupled to ferromagnetic leads. The theory covers both the linear and nonlinear transport regime, takes non-collinear magnetization of the leads into account, and allows for an externally-applied magnetic field. We derive generalized rate equations for the dot's occupation and accumulated spin and discuss the influence of the dot's spin on the transmission. A negative differential conductance and a nontrivial dependence of the conductance on the angle between the lead magnetizations is predicted.
Keywords
Cite
@article{arxiv.cond-mat/0404455,
title = {Theory of Transport through Quantum-Dot Spin Valves in the Weak-Coupling Regime},
author = {Matthias Braun and Jürgen König and Jan Martinek},
journal= {arXiv preprint arXiv:cond-mat/0404455},
year = {2009}
}
Comments
14 pages, 13 figures, updated version as published, Journal reference