Spin Current Through a Magnetic-Oscillating Quantum Dot
介观与纳米尺度物理
2007-05-23 v1 强关联电子
摘要
Non-equilibrium spin transport through an interacting quantum dot is analyzed. The coherent spin oscillations in the dot provide a generating source for spin current. In the interacting regime, the Kondo effect is influenced in a significant way by the presence of the precessing magnetic field. In particular, when the precession frequency is tuned to resonance between spin up and spin down states of the dot, Kondo singularity for each spin splits into a superposition of two resonance peaks. The Kondo-type cotunneling contribution is manifested by a large enhancement of the pumped spin current in the strong coupling, low temperature regime.
引用
@article{arxiv.cond-mat/0304597,
title = {Spin Current Through a Magnetic-Oscillating Quantum Dot},
author = {Ping Zhang and Qi-Kun Xue and X. C. Xie},
journal= {arXiv preprint arXiv:cond-mat/0304597},
year = {2007}
}
备注
9 pages, 5 figures