A spin pump turnstile: parametric pumping of a spin-polarized current through a nearly-closed quantum dot
Mesoscale and Nanoscale Physics
2009-11-10 v2
Abstract
We investigate parametric pumping of a spin-polarized current through a nearly-closed quantum dot in a perpendicular magnetic field. Pumping is achieved by tuning the tunnel couplings to the left and right lead - thereby operating the quantum dot as a turnstile - and changing either the magnetic field or a gate-voltage. We analyze the quantum dynamics of a pumping cycle and the limiting time scales for operating the quantum dot turnstile as a pure spin pump. The proposed device can be used as a fully controllable double-sided and bipolar spin filter and to inject spins "on demand".
Cite
@article{arxiv.cond-mat/0411193,
title = {A spin pump turnstile: parametric pumping of a spin-polarized current through a nearly-closed quantum dot},
author = {M. Blaauboer and C. M. L. Fricot},
journal= {arXiv preprint arXiv:cond-mat/0411193},
year = {2009}
}
Comments
5 pages, 2 figures, one reference corrected