SPATIAL CORRELATION OF IONIZED DONORS AND ITS EFFECT ON SCATTERING TIME AND SPIN SPLITTING IN A 2-DIMENSIONAL ELECTRON-GAS

We study the effect of spatial correlation of ionized donors on the si ngle-particle scattering time and on spin splitting in a two-dimension al electron gas (2DEG). As the correlation is being reduced we observe a reduction in the scattering time and a collapse of the spin-splitte d peaks into a single peak. We find these electronic properties to be much more sensitive than the momentum relaxation time (or mobility) in high mobility 2DEG. We compare our results with Monte Carlo simulatio ns and find them to be in partial agreement.