We report on the spin relaxation in GaAs-based quantum wires and wells studied at 50 K < T < 180 K by analyzing the circularly polarized photoluminescence transients. A 3.5-times shortening of the electron spin relaxation time is observed in GaAs/AlGaAs quantum wires compared with that in quantum wells at 180 K. The observed results suggest that a spin flip in the quantum wires is caused predominantly by the D'yakonov-Perel' effect due to spin-orbit interaction. The strong quantum confinement of electrons in the reduced dimensionality of the quantum structure leads to a larger spin splitting energy and a stronger temperature dependence of spin relaxation.
|ジャーナル||Japanese Journal of Applied Physics, Part 2: Letters|
|出版ステータス||Published - 1999 8月|
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