The apparent Dresselhaus coefficient in (001) GaAs quantum wells is gamma_3D sqrt(tau_3^{2D}/tau_{1+3}^{2D}) ~ 9.2 eV Å^3, because projecting the cubic field to 2D lengthens the spin-orbit correlation time by about 1.8.
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Apparent Dresselhaus coefficient in (001) GaAs quantum wells: Correlation-time renormalization in D'yakonov-Perel' spin relaxation
The apparent Dresselhaus coefficient in (001) GaAs quantum wells is gamma_3D sqrt(tau_3^{2D}/tau_{1+3}^{2D}) ~ 9.2 eV Å^3, because projecting the cubic field to 2D lengthens the spin-orbit correlation time by about 1.8.