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Hyper‐Raman and Raman scattering in paratellurite TeO 2
Author(s) -
Rodriguez Vincent,
Couzi Michel,
Adamietz Frédéric,
Dussauze Marc,
Guery Guillaume,
Cardinal Thierry,
Veber Philippe,
Richardson Kathleen,
Thomas Philippe
Publication year - 2013
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.4251
Subject(s) - raman spectroscopy , raman scattering , rayleigh scattering , tetragonal crystal system , polarization (electrochemistry) , polar , x ray raman scattering , wavenumber , chemistry , raman optical activity , molecular physics , coherent anti stokes raman spectroscopy , physics , optics , condensed matter physics , nuclear magnetic resonance , crystallography , crystal structure , quantum mechanics
Raman spectra of the tetragonal D 4 4 structure of paratellurite TeO 2 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 A 2 (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. Copyright © 2013 John Wiley & Sons, Ltd.