Enhanced spin relaxation time due to electron-electron scattering in semiconductors

Abstract

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/AlGaAs 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 life-time 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 electron-electron collisions. The experimental results and theoretical predictions for the spin relaxation times are in good quantitative agreement.

8 pages, 5 figures

References in corpus (6)

• Spintronics: Fundamentals and applications
• Spin Relaxation Anisotropy in Two-Dimensional Semiconductor Systems
• Spin relaxation of conduction electrons in bulk III-V semiconductors
• Coulomb scattering lifetime of a two-dimensional electron gas
• Hot-electron effect in spin dephasing in $n$-type GaAs quantum wells
• Multi-subband effect in spin dephasing in semiconductor quantum wells

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