To study electron spin relaxation mechanisms in GaAs/AlGaAs quantum wells (QWs), undoped and n-doped (1 0 0) and (1 1 0) QWs with different well width and doping density are prepared and measured. The temperature dependence of electron spin relaxation time τs in n-doped (1 0 0) QWs above 30 K is shown to be in good agreement with what is expected from the D'yakonov-Perel' (DP) mechanism. In (1 1 0) QWs, a 30-fold increase of τs over (1 0 0) QWs at room temperature is observed. This dramatic increase is explained by the suppression of the DP mechanism. The remaining spin relaxation processes in (1 1 0) QWs are discussed.
|Number of pages||4|
|Journal||Physica E: Low-Dimensional Systems and Nanostructures|
|Publication status||Published - 2000 Feb|
|Event||13th International Conference on the Electronic Properties of Two-Dimensional Systems (EP2DS-13) - Ottawa, Ont, Can|
Duration: 1999 Aug 1 → 1999 Aug 6