Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models
Using the Feynman-Pines diagram technique, the energy spectrum of localized quasi-particles interacting with polarization phonons is calculated and analyzed in the wide range of energies at the finite temperature of the system. It is established that the general model of the system, besides the bo...
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| Veröffentlicht in: | Condensed Matter Physics |
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| Datum: | 2016 |
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| Format: | Artikel |
| Sprache: | English |
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Інститут фізики конденсованих систем НАН України
2016
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| Online Zugang: | https://nasplib.isofts.kiev.ua/handle/123456789/156551 |
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| Zitieren: | Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models / M.V. Tkach, Ju.O. Seti, O.M. Voitsekhivska, O.Yu. Pytiuk // Condensed Matter Physics. — 2016. — Т. 19, № 4. — С. 43701: 1–13 . — Бібліогр.: 21 назв. — англ. |
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Tkach, M.V. Seti, Ju.O. Voitsekhivska, O.M. Pytiuk, O.Yu. 2019-06-18T16:26:59Z 2019-06-18T16:26:59Z 2016 Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models / M.V. Tkach, Ju.O. Seti, O.M. Voitsekhivska, O.Yu. Pytiuk // Condensed Matter Physics. — 2016. — Т. 19, № 4. — С. 43701: 1–13 . — Бібліогр.: 21 назв. — англ. 1607-324X PACS: 71.38. - k, 63.20.kd, 63.20.dk, 72.10.Di DOI:10.5488/CMP.19.43701 arXiv:1612.07188 https://nasplib.isofts.kiev.ua/handle/123456789/156551 Using the Feynman-Pines diagram technique, the energy spectrum of localized quasi-particles interacting with polarization phonons is calculated and analyzed in the wide range of energies at the finite temperature of the system. It is established that the general model of the system, besides the bound states known from the simplified model with an additional condition for the operator of quasi-particles number, contains the new bound states even for the systems with weak coupling. The contribution of multi-phonon processes into the formation of renormalized spectrum of the system is analyzed. The reasons of the appearance, behaviour and disappearance of separate pairs of bound states depending on the coupling constant and temperature are revealed. Методом дiаграмної технiки Фейнмана-Пайнса розраховано i дослiджено енергетичний спектр локалiзованих квазiчастинок, взаємодiючих з поляризацiйними фононами у широкiй областi енергiй при скiнченнiй температурi системи. Показано, що загальна модель системи крiм зв’язаних станiв, вiдомих зi спрощеної моделi з накладеною додатковою умовою на оператор повного числа квазiчастинок, навiть зi слабким зв’язком мiстить новi зв’язанi стани. Виявлена роль багатофононних процесiв у формуваннi перенормованого спектру системи. Встановлено причини появи, еволюцiї та зникнення окремих пар зв’язаних станiв у залежностi вiд величини енергiї зв’язку та температури. en Інститут фізики конденсованих систем НАН України Condensed Matter Physics Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models Властивостi i температурна еволюцiя спектру системи локалiзованих квазiчастинок взаємодiючих з поляризацiйними фононами у двох моделях Article published earlier |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models |
| spellingShingle |
Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models Tkach, M.V. Seti, Ju.O. Voitsekhivska, O.M. Pytiuk, O.Yu. |
| title_short |
Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models |
| title_full |
Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models |
| title_fullStr |
Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models |
| title_full_unstemmed |
Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models |
| title_sort |
properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models |
| author |
Tkach, M.V. Seti, Ju.O. Voitsekhivska, O.M. Pytiuk, O.Yu. |
| author_facet |
Tkach, M.V. Seti, Ju.O. Voitsekhivska, O.M. Pytiuk, O.Yu. |
| publishDate |
2016 |
| language |
English |
| container_title |
Condensed Matter Physics |
| publisher |
Інститут фізики конденсованих систем НАН України |
| format |
Article |
| title_alt |
Властивостi i температурна еволюцiя спектру системи локалiзованих квазiчастинок взаємодiючих з поляризацiйними фононами у двох моделях |
| description |
Using the Feynman-Pines diagram technique, the energy spectrum of localized quasi-particles interacting with
polarization phonons is calculated and analyzed in the wide range of energies at the finite temperature of
the system. It is established that the general model of the system, besides the bound states known from the
simplified model with an additional condition for the operator of quasi-particles number, contains the new
bound states even for the systems with weak coupling. The contribution of multi-phonon processes into the
formation of renormalized spectrum of the system is analyzed. The reasons of the appearance, behaviour and
disappearance of separate pairs of bound states depending on the coupling constant and temperature are
revealed.
Методом дiаграмної технiки Фейнмана-Пайнса розраховано i дослiджено енергетичний спектр локалiзованих квазiчастинок, взаємодiючих з поляризацiйними фононами у широкiй областi енергiй при скiнченнiй температурi системи. Показано, що загальна модель системи крiм зв’язаних станiв, вiдомих зi
спрощеної моделi з накладеною додатковою умовою на оператор повного числа квазiчастинок, навiть
зi слабким зв’язком мiстить новi зв’язанi стани. Виявлена роль багатофононних процесiв у формуваннi перенормованого спектру системи. Встановлено причини появи, еволюцiї та зникнення окремих пар
зв’язаних станiв у залежностi вiд величини енергiї зв’язку та температури.
|
| issn |
1607-324X |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/156551 |
| citation_txt |
Properties and temperature evolution of the spectrum of localized quasi-particles interacting with polarization phonons in two models / M.V. Tkach, Ju.O. Seti, O.M. Voitsekhivska, O.Yu. Pytiuk // Condensed Matter Physics. — 2016. — Т. 19, № 4. — С. 43701: 1–13 . — Бібліогр.: 21 назв. — англ. |
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