Pumping Current in a Quantum Dot by an Oscillating Magnetic Field
Mesoscale and Nanoscale Physics
2009-11-11 v2
Abstract
We investigate spin and charge current through a quantum dot pumped by a time-varying magnetic field. Using the density matrix method, quantum rate equations for the electronic occupation numbers in the quantum dot are obtained and solved in the stationary state limit for a wide set of setup parameters. Both charge and spin current are expressed explicitly in terms of several relevant parameters and analyzed in detail. The results suggest a way of optimizing experimental setup parameters to obtain an maximal spin current without the charge current flow.
Cite
@article{arxiv.cond-mat/0610873,
title = {Pumping Current in a Quantum Dot by an Oscillating Magnetic Field},
author = {Zhao Yang Zeng and Hong Li and Baowen Li},
journal= {arXiv preprint arXiv:cond-mat/0610873},
year = {2009}
}
Comments
to appear in the proceedings of the international conference on frontiers in nonlinear and complex systems as a special issue in the International Journal of Modern Physics B, vol. 21,