The effects of electron-electron interactions on the spin transport dynamics of a two-dimensional electron gas

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Spin transport properties of a spin-polarized two-dimensional electron gas are studied in the presence of electron-electron interactions. Longitudinal and transverse spin diffusion coefficients are calculated with the quantum transport equation which includes many-particle effects in the random phase approximation. We find that the e-e scattering, which does not contribute to charge drift mobility, has a significant contribution to the spin diffusion. Thus, e-e interaction causes non-negligible effects on the operations of proposed devices dependent on spin transport in semiconductor heterostructures.