Spin Polarized Current through Serially coupled Double Quantum Dots with Rashba Spin- Orbit Interaction

Abstract

In this paper, a physical model is introduced for studying the Spin polarized electron current in the presence of Rashba spin-orbit effect (RSO) through a serially (one level) coupled double quantum dots made of different semiconductor material that give different Zeeman splitting for the two dots under the influence of an external magnetic field.
The transport properties and the factors effecting it such as the energies ( for the two dots, Rashba spin-orbit interaction energy, tunneling energy, the tunneling spin polarized current and polarization are all calculated as a function of the detuning energy (Eia). Finally, we explain and give some analyzation to the effect of Rashba spin-orbit interaction in a double quantum dots system.