Resonance raman scattering in CdTe/CdMnTe superlattices under a magnetic field

We present a comparative study of the pseudo-absorption and resonance Raman scattering in CdTe/Cd1-xMnxTe superlattices in the presence of an external magnetic field. Under excitation with circularly polarized light, the resonance Raman profiles separate into two components corresponding to the Zeeman-split ground state excitons. A further analysis of the polarization of the scattered light proves that the efficiency of the Fröhlich mechanism is larger by a factor of ∼ 10 than the corresponding deformation-potential one. © 1992.