0372-400Х (Edition in Ukrainian)
2071-0186 (Edition in English)
2071-0194 (in electronic form)
Abbreviated key title: Ukr. J. Phys.
Current issue Ukr. J. Phys. 2014, Vol. 58, N 9, p.863-864
Oles Honchar Dnipropetrovsk National University
(72, Gagarin Ave., Dnipropetrovsk 49050, Ukraine; e-mail: email@example.com)
Long-Wave High-Frequency Oscilations in Ionic Crystals with Two Atoms in Elementary Cell
Section: Solid matter
Original Author's Text: Ukrainian
Abstract: Long-wave high-frequency electromagnetic oscillations in an ionic crystal with two atoms in an elementary cell have been considered in the framework of a self-consistent model for free point charges in the electromagnetic field in a dielectric medium. The frequency of longitudinal phonons is shown to equal the ionic plasma frequency divided by the square root of the highfrequency dielectric permittivity. The standard dispersion law for the upper phonon-polariton branch is obtained.
Key words: long-wave oscillations, phonon-polariton, ion plasma frequency.