Publication
Applied Physics Letters
Paper
Observation of miniband formation in the CdTe/Cd1-xMn xTe quantum well system
Abstract
We report the effects of perpendicular electric fields on the eigenenergies of the CdTe/Cd1-xMnxTe quantum well system. The samples are probed at 6 K using photoluminescence. In an electric field, the photoluminescence spectra of wide-barrier quantum well samples red shifted, consistent with the quantum-confined Stark effect. The spectra of narrow-barrier superlattice samples blue shifted, indicative of miniband reduction to localized states. A linear blue shift was observed up to a field of 50 kV/cm after which saturation occurred. Additionally, we have observed luminescence which appeared to arise from transitions between adjacent wells. No striking effects were observed at the paramagnetic-spin glass transition temperature.