Far-Infrared Dielectric Function of Zincblende ZnS

✍ Scribed by A. Memon; D. B. Tanner

• Publisher: John Wiley and Sons
• Year: 1985
• Tongue: English
• Weight: 253 KB
• Volume: 128
• Category: Article
• ISSN: 0370-1972
• DOI: 10.1002/pssb.2221280106

✦ Synopsis

Abstract

The complex dielectric response function of zincblende ZnS is determined at 300 K by dispersive Fourier transform spectroscopy. The frequency range studied, 150 to 450 cm^−1^, spans the frequency of the q = O transverse optic (TO) phonon mode. The frequency dependence of the anharmonic self‐energy function Γ(ν) of the q = 0 TO phonon is calculated from these data. The features observed in the spectrum of Γ(ν) are satisfactorily assigned to multi‐phonon processes by comparison to theoretical lattice dynamics calculations for cubic ZnS.