Current induced electron spin polarization in strained semiconductors

Details Current induced electron spin polarization in strained semiconductors Current induced electron spin polarization in strained semiconductors

2004-03-16

arxiv.org/abs/cond-mat/0403407v1

Phys. Rev. Lett. 93, 176601 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 pages, 4 figures, 1 table

Scientific paper

10.1103/PhysRevLett.93.176601

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.

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