A theoretical study of the growth-direction magnetic-field effects on the exciton photoluminescence peak energies in GaAs–Ga 1− x Al x As quantum-dot/ultrathin quantum-well systems is presented. Calculations are performed within the effective-mass approximation and taking into account nonparabolicity effects for both the conduction-band and valence-band effective masses. We use a simple 'QD+ultrathin QW' model heterostructure to mimic the actual physical system, and calculated results for the exciton diamagnetic shifts are found in overall agreement with recent experimental measurements.
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Barticevic et al. (2007) studied this question.
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