We report on the spin transport of photoexcited spin polarized electrons in n-type GaAs under steady state conditions. Spin-diffusion, -drift and -relaxation are measured via spatially resolved Faraday rotation. If strain is applied to the sample, spin precession is observed for strain is along , due to the k-linear spin splitting induced by the off-diagonal strain components. No significant effect is seen for strain along . From the results, we obtain a spin splitting constant of C3 = 7.6 eVÅ. We believe that the described method for the determination of this constant is more direct than previously reported approaches. Spin transport is described theoretically in a drift-diffusion model taking into account the D'yakonov-Perel' and Elliot-Yafet spin relaxation mechanisms and the heating of the electron gas.
|Number of pages||2|
|Journal||AIP conference proceedings|
|Publication status||Published - 30 Jun 2005|
|Event||27th International Conference on the Physics of Semiconductors, ICPS-27 - Flagstaff, United States|
Duration: 26 Jul 2004 → 30 Jul 2004
Conference number: 27