Magnetophonon resonance in high-density high-mobility quantum well systems
Résumé
We have investigated the magnetophonon resonance ~MPR! effect in a series of single GaAs quantum well samples which are symmetrically modulation doped in the adjacent short period AlAs/GaAs superlattices. Two distinct MPR series are observed originating from the G and X electrons interacting with the GaAs and AlAs longitudinal optic (LO) phonons respectively. This confirms unequivocally the presence of X electrons in the AlAs quantum well of the superlattice previously invoked to explain the high electron mobility in these structures @Friedland et al., Phys. Rev. Lett 77, 4616, (1996)
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