Description of lattice anharmonicity observed in ferroelectrics with unusual three-well local potential

• Published in: Condensed Matter Physics
• Date: 2018
• Main Authors: Yevych, R., Vysochanskii, Yu.
• Format: Article
• Language: English
• Published: Інститут фізики конденсованих систем НАН України 2018
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/157076
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Description of lattice anharmonicity observed in ferroelectrics with unusual three-well local potential / R. Yevych, Yu. Vysochanskii // Condensed Matter Physics. — 2018. — Т. 21, № 3. — С. 33001: 1–6. — Бібліогр.: 19 назв. — англ.

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, namely thermal expansion. The calculated pseudospin fluctuations spectra i...