Current-induced spin polarization in strained semiconductors.
The polarization of conduction electron spins due to an electrical current is observed in strained nonmagnetic semiconductors using static and time-resolved Faraday rotation. The density, lifetime, and orientation rate of the electrically polarized spins are characterized by a combination of optical and electrical methods. In addition, the dynamics of the current-induced spins are investigated by utilizing electrical pulses generated from a photoconductive switch. These results demonstrate the possibility of a spin source for semiconductor spintronic devices without the use of magnetic materials.
Kato
Y K
YK
Center for Spintronics and Quantum Computation, University of California, Santa Barbara, California 93106, USA.
Myers
R C
RC
Gossard
A C
AC
Awschalom
D D
DD