Abstract
We present an optical study of novel ZnSe/BeTe heterostructures with a type-II band alignment based on beryllium chalcogenides. A strong exciton transition involving a confined electron and a quasibound hole state (both in the ZnSe layer) is observed in photoluminescence, photoluminescence excitation and reflectivity spectra. This exciton state is drastically broadened by increasing temperature due to enhanced exciton—acoustic phonon interaction. Pronounced features related to the quasibound hole states in the ZnSe layer (upto n = 4) are detected.
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