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Raman scattering of quasimodes in ZnO

AuthorsAlarcón-Lladó, Esther ; Cuscó, Ramón ; Artús, Lluís ; Jiménez, Juan; Wang, B.; Callahan, M.
Issue DateNov-2008
PublisherInstitute of Physics Publishing
CitationJournal of Physics - Condensed Matter 22(44): 445211(2008)
AbstractThe angular dependence of the optical phonons of high-quality bulk ZnO has been systematically studied by means of Raman scattering. We report the observation of quasi-TO and quasi-LO modes for propagation directions covering the whole a–c mixing plane using a beveled ZnO single crystal sample. Scattering experiments performed in two different configuration geometries indicate that birefringence effects are not relevant for the phonon analysis in this material. The observed angular dependence of the quasimode frequencies is in good agreement with Loudon’s model.
Publisher version (URL)stacks.iop.org/JPhysCM/20/445211
Appears in Collections:(ICTJA) Artículos
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