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Far‐Infrared Dielectric Function of Zincblende ZnS
Author(s) -
Memon A.,
Tanner D. B.
Publication year - 1985
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221280106
Subject(s) - anharmonicity , phonon , fourier transform , dielectric function , condensed matter physics , dielectric , infrared , lattice (music) , dielectric response , materials science , function (biology) , lattice vibration , transverse plane , spectroscopy , physics , optics , quantum mechanics , optoelectronics , structural engineering , acoustics , engineering , evolutionary biology , biology
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.