Abstract
The luminescence spectra of Cd0.75Mn0.25Te/Cd1 − yMgyTe superlattices with narrow-band-gap Cd0.75Mn0.25Te nanolayers having nominal thicknesses of 0.5, 1.5, and 3.0 monolayers (MLs) exhibit exciton emission bands of Cd1 − yMgyTe barriers and nanolayers, as well as intracenter luminescence of Mn2+ ions. For all samples, the luminescence spectra of Cd0.75Mn0.25Te nanolayers consist of two bands. From analyzing the dependences of the luminescence intensity on the nanolayer thickness and temperature, these bands are assigned to excitons localized at two-and zero-dimensional potentials. The intracenter emission of Mn2+ in 3.0-ML-thick Cd0.75Mn0.25Te clearly reveals excitation migration.
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