Nonlinear dynamics of ferroelectrics with three-well local potential
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 under pressure is determined by thee-well local potential and can be described...
Збережено в:
| Дата: | 2018 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2018
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/157049 |
| Теги: |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Nonlinear dynamics of ferroelectrics with three-well local potential / R. Yevych, M. Medulych, Yu. Vysochanskii // Condensed Matter Physics. — 2018. — Т. 21, № 2. — С. 23001: 1–8. — Бібліогр.: 25 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | 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 under
pressure is determined by thee-well local potential and can be described in an anharmonic quantum oscillator
model. For such a model, the spectrum of pseudospin fluctuations at different temperatures and pressures
has been calculated and compared with the data of Raman spectroscopy. It was revealed that the ferroelectric
lattice instability is related to several low energy optic modes. |
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