Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field
The pseudospin-electron model with a direct interaction between pseudospins and with transverse field is considered. In the absence of electron transfer, the equilibrium states of the model are studied in the mean field approximation. In the µ = const regime, two types of the first order phase tran...
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| Дата: | 2000 |
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| Автор: | |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2000
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/120982 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field / Yu.I. Dublenych // Condensed Matter Physics. — 2000. — Т. 3, № 4(24). — С. 815-825. — Бібліогр.: 8 назв. — англ. |
Репозитарії
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irk-123456789-1209822017-06-14T03:03:03Z Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field Dublenych, Yu.I. The pseudospin-electron model with a direct interaction between pseudospins and with transverse field is considered. In the absence of electron transfer, the equilibrium states of the model are studied in the mean field approximation. In the µ = const regime, two types of the first order phase transitions (with jumps of the mean values of pseudospins and average electron concentration) are revealed. At T → 0 , phase transitions of the first type disappear, on increasing the transverse field, while those of the second type persist at any large value of the field. The phase transitions of the second type are caused by simultaneous effect of pseudospin-electron interaction and transverse field. It is also shown that in the n = const regime at zero temperature, the phase separation occurs at all values of a longitudinal field h . В наближенні середнього поля досліджено рівноважні стани псевдоспін-електронної моделі з прямою взаємодією псевдоспінів та з поперечним полем за відсутности перенесення електронів. У режимі µ = const виявлено фазові переходи першого роду (зі стрибкоподібною зміною середнього значення псевдоспіна та середньої електронної концентрації) двох типів: перші у випадку T → 0 зникають зі збільшенням поперечного поля, інші залишаються, яким би великим не було це поле. Фазові переходи другого типу зумовлені одночасним впливом псевдоспін-електронної взаємодії та поперечного поля. Показано також, що в режимі n = const за нульової температури відбувається розшарування фаз в усій області значень поздовжнього поля h . 2000 Article Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field / Yu.I. Dublenych // Condensed Matter Physics. — 2000. — Т. 3, № 4(24). — С. 815-825. — Бібліогр.: 8 назв. — англ. 1607-324X DOI:10.5488/CMP.3.4.815 PACS: 74.65.+n, 71.45.Gm http://dspace.nbuv.gov.ua/handle/123456789/120982 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 |
The pseudospin-electron model with a direct interaction between pseudospins and with transverse field is considered. In the absence of electron
transfer, the equilibrium states of the model are studied in the mean field
approximation. In the µ = const regime, two types of the first order phase
transitions (with jumps of the mean values of pseudospins and average
electron concentration) are revealed. At T → 0 , phase transitions of the
first type disappear, on increasing the transverse field, while those of the
second type persist at any large value of the field. The phase transitions of
the second type are caused by simultaneous effect of pseudospin-electron
interaction and transverse field. It is also shown that in the n = const
regime at zero temperature, the phase separation occurs at all values of a
longitudinal field h . |
| format |
Article |
| author |
Dublenych, Yu.I. |
| spellingShingle |
Dublenych, Yu.I. Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field Condensed Matter Physics |
| author_facet |
Dublenych, Yu.I. |
| author_sort |
Dublenych, Yu.I. |
| title |
Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field |
| title_short |
Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field |
| title_full |
Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field |
| title_fullStr |
Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field |
| title_full_unstemmed |
Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field |
| title_sort |
phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field |
| publisher |
Інститут фізики конденсованих систем НАН України |
| publishDate |
2000 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/120982 |
| citation_txt |
Phase transitions and phase separation in a pseudospin-electron model with direct interaction between pseudospins and with transverse field / Yu.I. Dublenych // Condensed Matter Physics. — 2000. — Т. 3, № 4(24). — С. 815-825. — Бібліогр.: 8 назв. — англ. |
| series |
Condensed Matter Physics |
| work_keys_str_mv |
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2023-10-18T20:38:39Z |
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2023-10-18T20:38:39Z |
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