Перегляд за автором "Yevych, R."

Сортувати за: Порядок: Результатів:

  • Description of lattice anharmonicity observed in ferroelectrics with unusual three-well local potential 
    Yevych, R.; Vysochanskii, Yu. (Condensed Matter Physics, 2018)
    For Sn₂P₂S₆ family of uniaxial ferroelectrics, the anharmonic quantum oscillators model, based on local threewell potential for spontaneous polarization fluctuations, has been used for a description of anharmonic properties, ...
  • Nonlinear dynamics of ferroelectrics with three-well local potential 
    Yevych, R.; Medulych, M.; Vysochanskii, Yu. (Condensed Matter Physics, 2018)
    For Sn₂P₂S₆ ferroelectrics, the appearance of spontaneous polarization is related to stereoactivity of tin cations and valence fluctuations of phosphorous cations. Here, the continuous phase transition and its behavior ...
  • Valence fluctuations in Sn(Pb)₂P₂S₆ ferroelectrics 
    Yevych, R.; Haborets, V.; Medulych, M.; Molnar, A.; Kohutych, A.; Dziaugys, A.; Banys, Ju.; Vysochanskii, Yu. (Физика низких температур, 2016)
    The valence fluctuations which are related to the charge disproportionation of phosphorous ions P⁴⁺+P⁴⁺→P³⁺+P⁺⁵ are the origin of ferroelectric and quantum paraelectric states in Sn(Pb)₂P₂S₆ semiconductors. They involve ...
  • X-ray photoelectron spectroscopy of Sn₂P₂S₆ crystals 
    Grigas, J.; Talik, E.; Lazauskas, V.; Vysochanskii, Yu.M.; Yevych, R.; Adamiec, M.; Nelkinas, V. (Condensed Matter Physics, 2008)
    The paper presents the X-ray photoelectron spectra (XPS) of the valence band (VB) and of the core levels (CL) of uniaxial ferroelectric Sn₂P₂S₆ single crystals from different crystallographic planes in both paraelectric and ...