engleski

Spectroscopy studies of structural phase transitions of chalcogenide glass thin films (Ge2S3)x(As2S3)1-x at coordination number 2.67

We have investigated Fourier transform (FTIR) spectra, Raman spectra and ultraviolet and visible absorption spectra of the (Ge2S3)x(As2S3)1-x chalcogenide glass thin films with 0.1≤ x≤ 0.9 and the average coordination number Z between 2.52 and 2.76. The relation of the structural and optical properties to teh average coordination number is demonstrated by varying the composition parameter x of the glass. All measured quantities energy gap, sound velocity, IR and Raman peak intensities, position and the intensity of the boson peak showed the extreme values at Z = 2.67, indicating that structural phase transition occur at this coordination number.

Disordered systems; Thin films; Inelastic light scattering; Light absorption and reflection

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