Abstract

The ground-state and optical properties of negative donor (D[sup [minus]]) centers in strong magnetic fields and quantum wells are studied using the effective mass theory. The exact ground-state binding energy is calculated to within statistical noise by a diffusion quantum Monte Carlo inethod. Excited state and optical transition energies are computed by carrying out variational Monte Carlo calculations. Comparison with available magneto-optical data of D[sup [minus]] centers in bulk GaAs and in GaAs/Al[sub x]Ga[sub 1-x]As quantum wells shows good agreement between theory and experiment over a range of magnetic field strengths.

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