Tunable pure spin currents in a triple-quantum-dot ring
Mesoscale and Nanoscale Physics
2009-11-13 v1 Strongly Correlated Electrons
Abstract
Electron transport properties in a triple-quantum-dot ring with three terminals are theoretically studied. By introducing local Rashba spin-orbit interaction on an individual quantum dot, we calculate the charge and spin currents in one lead. We find that a pure spin current appears in the absence of a magnetic field. The polarization direction of the spin current can be inverted by altering the bias voltage. In addition, by tuning the magnetic field strength, the charge and spin currents reach their respective peaks alternately.
Cite
@article{arxiv.0808.0950,
title = {Tunable pure spin currents in a triple-quantum-dot ring},
author = {Weijiang Gong and Yisong Zheng and Tianquan Lv},
journal= {arXiv preprint arXiv:0808.0950},
year = {2009}
}
Comments
5 pages, 2 Figures