Moldavian Journal of the Physical Sciences (Dec 2010)
Electron tunneling in an asymmetry heterostructure under the influence of both dresselhaus and rashba spin–orbit terms
Abstract
The problem of spin dependent electron transmission through an asymmetric InAs/GaSb/InAs well is studied theoretically in order to investigate the output transmission current polarization at a zero magnetic field. Transparency of electron transmission is calculated as a function of electron energy as well as the well width within the one electron band approximation along with the spin orbit interaction. We predict that a spin-polarized current spontaneously emerges in the absence of magnetic material and magnetic field. This phenomenon may offer a novel way for generating a spin-polarized current, replacing the traditional spin-injection method.