We studied the transport properties of spin-polarized conduction electrons in GaAs by time-resolved photoinjection and photoluminescence polarization measurements. Under an electric field of a few kV/cm, the degree of the spin polarization considerably decreases during drift transport over the distance shorter than 4 μm. Spin relaxation by D'yakonov-Perel' mechanism is suggested to be the cause of such a rapid spin depolarization for hot electrons under a moderate electric field at low temperatures.
|Number of pages||3|
|Journal||Journal of Superconductivity and Novel Magnetism|
|Publication status||Published - 2003|
- Spin dynamics
- spin relaxation
- Spin transport
- Time-resolved optical spectroscopy