Parametric quantum spin pump
Condensed Matter
2009-11-07 v1
Abstract
We investigate a non-adiabatic parametric quantum pump consists of a nonmagnetic scattering region connected by two ferromagnetic leads. The presence of ferromagnetic leads allows electrons with different spins to experience different potential landscape. Using this effect we propose a quantum spin pump that drives spin-up electrons to flow in one direction and spin-down electrons to flow in opposite direction. As a result, the spin pump can deliver a spin current with vanishing charge current.
Keywords
Cite
@article{arxiv.cond-mat/0211460,
title = {Parametric quantum spin pump},
author = {Wei Zheng and Junling Wu and Baigeng Wang and Jian Wang and Qingfeng Sun and Hong Guo},
journal= {arXiv preprint arXiv:cond-mat/0211460},
year = {2009}
}