RAMAN SCATTERING SPECTRA OF b-LiNH4SO4 CRYSTALS
Abstract
The vibrational spectra of b-LiNH4SO4crystals in the ferroelectric phase (space group No. 33) are studied. On the basis of group-theoretical analysis, a classification of the vibrational symmetry is performed. Using the first-principle approach within the framework of the electron density functional theory, as well as the perturbation theory, the vibrational frequencies of the structural elements of the crystal are calculated. The Raman scattering spectra of the b-LiNH4SO4 crystal are calculated and compared with the experimental literature data. Based on the theoretical calculations, the main structural components playing one of the major roles for optical studies are discussed.
About the Authors
M. Ya. Rudysh
Ivan Franko National University of Lviv; Institute of Physics, J. Dlugosh University
Russian Federation
Russian Federation
A. I. Kashuba
Ivan Franko National University of Lviv
Russian Federation
Russian Federation
V. Yo. Stadnyk
Ivan Franko National University of Lviv
Russian Federation
Russian Federation
R. S. Brezvin
Ivan Franko National University of Lviv
Russian Federation
Russian Federation
P. A. Shchepanskyi
Ivan Franko National University of Lviv; Institute of Physics, J. Dlugosh University
Russian Federation
Russian Federation
V. M. Gaba
National University “Lviv Politechnic”
Russian Federation
Russian Federation
Z. A. Kohut
National University “Lviv Politechnic”
Russian Federation
Russian Federation
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Review
For citations:
Rudysh M.Ya., Kashuba A.I., Stadnyk V.Y., Brezvin R.S., Shchepanskyi P.A., Gaba V.M., Kohut Z.A. RAMAN SCATTERING SPECTRA OF b-LiNH4SO4 CRYSTALS. Zhurnal Prikladnoii Spektroskopii. 2018;85(6):896-903. (In Russ.)
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