Abstract
Far-infrared magnetospectroscopic studies of quasi-two-dimensional donor impurity states have been carried out on several GaAs/As multiple-quantum-well samples with different doping densities in the barrier with constant sheet doping in the well. Two distinct features on the low-frequency side of cyclotron resonance (CR) were observed. Extensive temperature- and carrier-density-dependence studies combined with statistical calculations of the occupancy of the various possible states have led to the assignment of these features to a triplet transition (∼13 lower than CR) and the transition (∼9 lower than CR).
- Received 24 April 1996
DOI:https://doi.org/10.1103/PhysRevB.54.R11086
©1996 American Physical Society