Spin-relaxation time of photogenerated degenerate electron distributions in GaAs is directly measured with the use of a mode-locked ruby laser and streak camera system. It is shown both theoretically and experimentally that the dominant relaxation mechanism is due to the spin precession mechanism of D'Yakonov-Perel'. The calculated spin-relaxation-rate dependency of Nₑ2/3 agrees well with the measured dependency of Nₑ0.63.
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Seymour et al. (1981) studied this question.
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