ELECTRON-OPTICAL-PHONON INTERACTION EFFECT ON THE INTRADONOR TRANSITION ENERGIES IN DOPED GAAS-ALXGA1-XAS QUANTUM-WELLS

We report a calculation of 1s --> 2p(+) transition energies of a donor impurity magnetopolaron located in GaAs quantum wells in the presence of an external magnetic field. The impurity levels are obtained throu gh a variational method by choosing a Gaussian trial wave function wit h only one variational parameter. Our theoretical results can account for the experimental data for the center-donor system when the approxi mation of a single well is used. We also found no evidence for the pre sence of electron-nonbulk-phonon interaction needed to understand this problem.