Polaronic Excitons in ZnCdSe/ZnSe Quantum Wells
Abstract
We present a detailed investigation of excitonic absorption in Zn0.69Cd0.31Se/ZnSe quantum wells under the application of a perpendicular magnetic field. The large energy separation between heavy- and light-hole excitons allows us to clearly resolve and identify magneto-excitonic absorption resonant with the continuum edge of the 1S heavy-hole exciton. Experimental values of the exciton binding energy are compared with results of a theoretical model that includes the exciton-phonon interaction. The remarkable agreemeent found unambiguously indicates the predominant polaronic character of excitons in ZnSe-based heterostructures.
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