Hyper-Raman and Raman scattering in paratellurite TeO2
GUERY, Guillaume
Institut des Sciences Moléculaires [ISM]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
School of Materials Science and Engineering [COMSET]
< Reduce
Institut des Sciences Moléculaires [ISM]
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
School of Materials Science and Engineering [COMSET]
Language
en
Article de revue
This item was published in
Journal of Raman Spectroscopy. 2013, vol. 44, n° 5, p. 739-745
Wiley
English Abstract
Raman spectra of the tetragonal D4/4 structure of paratellurite TeO2 have been revisited avoiding anomalous polarization-selection-rules violations previously observed and due to optical activity. We present a complementary ...Read more >
Raman spectra of the tetragonal D4/4 structure of paratellurite TeO2 have been revisited avoiding anomalous polarization-selection-rules violations previously observed and due to optical activity. We present a complementary hyper-Raman scattering study of paratellurite. Wavenumber and symmetry assignments are given for all expected 21 Raman active optical branches, except one LO component (out of the eight expected TO-LO pairs) of the polar doublet E modes. Also, the four expected hyper-Raman active A2 (TO) modes have been observed. Moreover, we have observed a strong Kleinman-disallowed hyper-Rayleigh signal, which is tentatively assigned as a first evidence of hyper-Rayleigh optical activity.Read less <
English Keywords
Hyper-Raman
Hyper-Rayleigh
Phonon
TO-LO modes
Paratellurite
Origin
Hal imported