Eur. Phys. J. B 43, 421-427 (2005)
https://doi.org/10.1140/epjb/e2005-00072-0

Spin-polarized transport through a coupled double-dot

Institute of Theoretical Physics, Shanxi University, Taiyuan, Shanxi 030006, China

Corresponding author: ^a yuhui@sxu.edu.cn

Received: 28 September 2004
Published online: 15 March 2005

Abstract

We investigate the quantum transport through a mesoscopic device consisting of an open, lateral double-quantum-dot coupled by time oscillating and spin-polarization dependent tunneling which results from a static magnetic field applied in the tunneling junction. In the presence of a non-vanishing bias voltage applied to two attached macroscopic leads both spin and charge currents are driven through the device. We demonstrate that the spin and charge currents are controllable by adjusting the gate voltage, the frequency of driving field and the magnitude of the magnetic field as well. An interesting resonance phenomenon is observed.