Magnetic field enhanced luminescence in ZnSe/BeMnTe multiple quantum wells with a type II band alignment

Magneto-optical properties of ZnSe/Be1−xMnxTe multiple quantum wells with a type II band alignment have been investigated with magnetic fields up to 7 T. We have observed a large Zeeman shift and an increase in intensity of the interface recombination band. The Zeeman shift is analyzed by a phenomenological model based on a strong p–d exchange interaction of the valence band in the Be1−xMnxTe layer. The increase in intensity is interpreted in terms of suppression of potential fluctuations due to the localized-spin alignment of Mn ions with the magnetic field.