publication . Article . 2007

Enhanced spin-relaxation time due to electron-electron scattering in semiconductor quantum wells

Leyland, W.J.H.; John, G.H.; Harley, R.T.; Glazov, M.M.; Ivchenko, E.L.; Ritchie, D.A.; Farrer, I.; Shields, A.J.; Henini, M.;
Open Access English
  • Published: 10 Apr 2007
  • Publisher: American Physical Society
  • Country: United Kingdom
We present a detailed experimental and theoretical analysis of the spin dynamics of two-dimensional electron gases (2DEGs) in a series of n-doped GaAs∕AlxGa1−xAs quantum wells. Picosecond-resolution polarized pump-probe reflection techniques were applied in order to study in detail the temperature, concentration, and quantum-well-width dependencies of the spin relaxation rate of a small photoexcited electron population. A rapid enhancement of the spin lifetime with temperature up to a maximum near the Fermi temperature of the 2DEG was demonstrated experimentally. These observations are consistent with the D’yakonov-Perel’ spin-relaxation mechanism controlled by ...
arXiv: Condensed Matter::Strongly Correlated ElectronsCondensed Matter::Mesoscopic Systems and Quantum Hall Effect
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