Resolved E-symmetry zone-centre phonons in LiTaO.sub.3./sub. and LiNbO.sub.3./sub..

0378669 - FZÚ 2013 RIV US eng J - Článek v odborném periodiku
Margueron, S. - Bartasyte, A. - Glazier, A. M. - Simon, Elizabeth - Hlinka, Jiří - Gregora, Ivan - Gleize, J.
Resolved E-symmetry zone-centre phonons in LiTaO₃ and LiNbO₃.
Journal of Applied Physics. Roč. 111, č. 10 (2012), "104105-1"-"104105-6". ISSN 0021-8979. E-ISSN 1089-7550.
[International Symposium on Integrated Functionalities (ISIF) /22./. San Juan, Puerto Rico, 13.06.2010-16.06.2010]
Grant CEP: GA AV ČR KAN301370701; GA ČR GAP204/10/0616
Výzkumný záměr: CEZ:AV0Z10100520
Klíčová slova: phonons * infrared and Raman spectroscopy * lithium niobate * lithium tantalate * ferroelectric
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 2.210, rok: 2012

E-symmetry optical phonons at the gamma point of LiNbO3 were experimentally resolved in spectra measured by infrared and Raman spectroscopy. For this purpose, congruent and nearly stoichiometric crystals of LiNbO3 and LiTaO3, and mixed LiNb1-xTaxO3, crystals were studied. The results show that some of the E modes have weak intensities in Raman or infrared spectra. Thus the complete assignment of E-symmetry modes has been achieved by comparing Raman and infrared data. In addition, this assignment has been confirmed by Raman measurements at low temperatures.
Trvalý link: http://hdl.handle.net/11104/0210083