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...
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| Дата: | 2018 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
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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 |
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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| id |
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irk-123456789-1570492019-06-20T01:26:17Z Nonlinear dynamics of ferroelectrics with three-well local potential Yevych, R. Medulych, M. Vysochanskii, Yu. 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. Для сегнетоелектрика Sn₂P₂S₆ поява спонтанної поляризацiї пов’язана зi стереоактивнiстю катiонiв олова та валентними флуктуацiями катiонiв фосфору. Неперервний фазовий перехiд та його поведiнка з тиском визначається локальним триямним потенцiалом i описується в моделi ангармонiчного квантового осцилятора. Для такої моделi розрахованi спектри флуктуацiй псевдоспiна при рiзних температурах i тисках, якi порiвнюються з даними раманiвської спектроскопiї. Показано, що нестiйкiсть сегнетоелектричної ґратки пов’язана з декiлькома низькоенергетичними оптичними модами. 2018 Article 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. 1607-324X PACS: 05.50.+q, 05.70.Fh, 63.70.+h, 77.84.-s DOI:10.5488/CMP.21.23001 arXiv:1806.09923 http://dspace.nbuv.gov.ua/handle/123456789/157049 en Condensed Matter Physics Інститут фізики конденсованих систем НАН України |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| language |
English |
| description |
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. |
| format |
Article |
| author |
Yevych, R. Medulych, M. Vysochanskii, Yu. |
| spellingShingle |
Yevych, R. Medulych, M. Vysochanskii, Yu. Nonlinear dynamics of ferroelectrics with three-well local potential Condensed Matter Physics |
| author_facet |
Yevych, R. Medulych, M. Vysochanskii, Yu. |
| author_sort |
Yevych, R. |
| title |
Nonlinear dynamics of ferroelectrics with three-well local potential |
| title_short |
Nonlinear dynamics of ferroelectrics with three-well local potential |
| title_full |
Nonlinear dynamics of ferroelectrics with three-well local potential |
| title_fullStr |
Nonlinear dynamics of ferroelectrics with three-well local potential |
| title_full_unstemmed |
Nonlinear dynamics of ferroelectrics with three-well local potential |
| title_sort |
nonlinear dynamics of ferroelectrics with three-well local potential |
| publisher |
Інститут фізики конденсованих систем НАН України |
| publishDate |
2018 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/157049 |
| citation_txt |
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. |
| series |
Condensed Matter Physics |
| work_keys_str_mv |
AT yevychr nonlineardynamicsofferroelectricswiththreewelllocalpotential AT medulychm nonlineardynamicsofferroelectricswiththreewelllocalpotential AT vysochanskiiyu nonlineardynamicsofferroelectricswiththreewelllocalpotential |
| first_indexed |
2023-05-20T17:51:25Z |
| last_indexed |
2023-05-20T17:51:25Z |
| _version_ |
1796154251756437504 |