Dependence of Soft Phonon Spectra on Flexoelectric Cou-pling in Ferroelectrics

  • A. N. Morozovska Institute of Physics, Nat. Acad. Sci. of Ukraine, Taras Shevchenko National University of Kyiv, Faculty of Physics, Chair of Theoretical Physics
  • C. M. Scherbakov Taras Shevchenko National University of Kyiv, Faculty of Physics, Chair of Theoretical Physics
  • M. D. Glinchuk I.M. Frantsevich Institute for Problems of Materials Science, Nat. Acad. Sci. of Ukraine


Analytical expressions describing the frequency dispersion of the soft transverse acoustic (TA)
and optic (TO) phonon modes in uniaxial ferroelectrics, as well as their dependence on the
flexoelectric coupling constant f, have been analyzed in the framework of the Landau–Ginzburg–
Devonshire theory. A critical behavior of the TA mode with respect to the f magnitude is

Keywords Landau–Ginzburg–Devonshire theory, flexoelectric coupling, soft phonon modes


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How to Cite
Morozovska, A., Scherbakov, C., & Glinchuk, M. (2018). Dependence of Soft Phonon Spectra on Flexoelectric Cou-pling in Ferroelectrics. Ukrainian Journal Of Physics, 63(2), 168. Retrieved from
Physics of magnetic phenomena and physics of ferroics