Angular behavior of E-doublets in Raman spectra of tetragonal gyrotropic crystals

S. G. Garasevich; Alexander V. Slobodyanyuk

doi:10.1117/12.486677

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11 December 2002 Angular behavior of E-doublets in Raman spectra of tetragonal gyrotropic crystals

S. G. Garasevich, Alexander V. Slobodyanyuk

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Proceedings Volume 4938, Selected Papers from the International Conference on Spectroscopy of Molecules and Crystals; (2002) https://doi.org/10.1117/12.486677
Event: XV International School on Spectroscopy of Molecules and Crystals, 2001, Chernivsti, Ukraine

Abstract

Angular dependencies of the Raman modes frequency on direciton of phonon wave vector q in tetragonal gyrotropic crystals TeO₂, ZnP₂, and CdP₂ were investigated and compared. We observed two completely different types of angular behavior of E-doublets splitting in depending on relative contributions of spatial dispersion and long-range Coulomb interaction. The explanation of apparent anomalous dependence of E-doublet 122 cm^-1 splitting on q in TeO₂ is proposed.

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S. G. Garasevich and Alexander V. Slobodyanyuk "Angular behavior of E-doublets in Raman spectra of tetragonal gyrotropic crystals", Proc. SPIE 4938, Selected Papers from the International Conference on Spectroscopy of Molecules and Crystals, (11 December 2002); https://doi.org/10.1117/12.486677

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