JMP  Vol.2 No.11 , November 2011
Spontaneous Spin Polarization of Electrons by Diluted Magnetic Heterostructures
ABSTRACT
The spin dependent electron transmission phenomenon in a diluted resonant semiconductor heterostructure is employed theoretically to investigate the output transmission current polarization at zero magnetic field. Transparency of electron transmission is calculated as a function of electron energy and the well width, within the one electron band approximation along with the spin orbit interaction. Enhanced spin-polarized resonant tunneling in the heterostructure due to Dresselhaus and Rashba spin-orbit coupling induced splitting of the resonant level is observed. We predict that a spin-polarized current spontaneously emerges in this heterostructure and we estimate theoretically that the polarization can reach 40%. This effect could be employed in the fabrication of spin filters, spin injectors and detectors based on non-magnetic semiconductors.

Cite this paper
nullC. Lee and A. Peter, "Spontaneous Spin Polarization of Electrons by Diluted Magnetic Heterostructures," Journal of Modern Physics, Vol. 2 No. 11, 2011, pp. 1272-1279. doi: 10.4236/jmp.2011.211157.
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