Raman Scattering in ZnSxSe1-x Alloys

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Abstract
Raman scattering at room temperature is reported in ZnS x Se1-x alloys for the range of 0≦x≦1. The optical phonon energies are varied as a function of x and subjected to asymmetric broadening. The asymmetric broadening of the spectra is explained by a “spatial correlation” model assuming spherical compositional clusters of which distribution is described by the Gaussian correlation function. The results demonstrate that Raman spectroscopy is a powerful tool to study the microscopic structure of the substitutional disorder.