Spin-Dependent Transport Through An Interacting Quantum Dot
摘要
We study the nonequilibrium spin transport through a quantum dot containing two spin levels coupled to the magnetic electrodes. A formula for the spin-dependent current is obtained and is applied to discuss the linear conductance and magnetoresistance in the interacting regime, where the so-called Kondo effect arises. We show that the Kondo resonance and the correlation-induced spin splitting of the dot levels may be systematically controlled by internal magnetization in the electrodes. As a result, when the electrodes are in parallel magnetic configuration, the linear conductance is characterized by two spin-resolved peaks. Furthermore, the presence of the spin-flip process in the dot splits the Kondo resonance into three peaks.
引用
@article{arxiv.cond-mat/0210241,
title = {Spin-Dependent Transport Through An Interacting Quantum Dot},
author = {Ping Zhang and Qi-Kun Xue and Yu-Peng Wang and X. C. Xie},
journal= {arXiv preprint arXiv:cond-mat/0210241},
year = {2009}
}
备注
9 pages, 5 figures