Spin-polarized transport through a coupled double-dot
Institute of Theoretical Physics, Shanxi University, Taiyuan, Shanxi 030006, China
Corresponding author: a email@example.com
Published online: 15 March 2005
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.
PACS: 72.10.Bg – General formulation of transport theory / 72.25.-b – Spin polarized transport / 73.23.-b – Electronic transport in mesoscopic systems
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2005