论文信息 - Transverse and longitudinal vibration modes in α-quartz

Transverse and longitudinal vibration modes in α-quartz

Abstract We analyse the infrared ellipsometric spectra of α-quartz in the wavenumber range 430 to 1350cm−1. We discuss the phenomenology of obliquely reflected light in order to understand the spectral shapes related to narrow phonon lines. The line shapes of the transverse resonances and their longitudinal counterparts are compared with the model of classical oscillators. The quantitative data are found to be in agreement with the decomposition of the dispersion in the transparent region into the electronic and vibronic contributions.

J. Humlíček

[1] J. Humlíček,et al. IR ellipsometry of the highly anisotropic materials αSiO2 and αAl2O3 , 1993 .

[2] Allan,et al. Dielectric tensor, effective charges, and phonons in alpha -quartz by variational density-functional perturbation theory. , 1992, Physical review letters.

[3] F. Gervais,et al. Temperature dependence of transverse and longitudinal optic modes in the α and β phases of quartz , 1975 .

[4] C. Pidgeon. Optical properties of solids edited by F. Abelès , 1973 .

[5] J. Scott,et al. Longitudinal and Transverse Optical Lattice Vibrations in Quartz , 1967 .

[6] J. Tauc,et al. The Optical Properties of Solids , 1967 .

[7] D. A. Kleinman,et al. Infrared Lattice Bands of Quartz , 1961 .