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Type: Artigo de periódico
Title: Light Scattering By Lithium Tantalate At Room Temperature
Author: Penna A.F.
Chaves A.
Andrade P.D.R.
Porto S.P.S.
Abstract: The room-temperature Raman spectra of LiTaO3 for all symmetry phonons are investigated. We make a new assignment of the phonons, which agrees with the selection rules of a C3 symmetry instead of C3v, contrary to Kaminow and Johnston's previous work. The oblique phonon dispersions are obtained and turn out to be consistent with our phonon assignments. We obtain also the polariton dispersion curve and, from it, the low-frequency dielectric constant. © 1976 The American Physical Society.
Rights: aberto
Identifier DOI: 10.1103/PhysRevB.13.4907
Date Issue: 1976
Appears in Collections:Unicamp - Artigos e Outros Documentos

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