Electron correlations in narrow energy bands: ground state energy and metal-insulator transition
The electron correlations in narrow energy bands are examined within the framework of the Hubbard model. The single-particle Green function and energy spectrum are obtained in a paramagnetic state at half-filling by means of a new two-pole approximation. Analytical expressions for the energy gap,...
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| Дата: | 2000 |
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| Автори: | , |
| 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/123456789/120984 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Electron correlations in narrow energy bands: ground state energy and metal-insulator transition / L. Didukh, Yu. Skorenkyy // Condensed Matter Physics. — 2000. — Т. 3, № 4(24). — С. 787-798. — Бібліогр.: 27 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
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irk-123456789-1209842017-06-14T03:06:08Z Electron correlations in narrow energy bands: ground state energy and metal-insulator transition Didukh, L. Skorenkyy, Yu. The electron correlations in narrow energy bands are examined within the framework of the Hubbard model. The single-particle Green function and energy spectrum are obtained in a paramagnetic state at half-filling by means of a new two-pole approximation. Analytical expressions for the energy gap, polar states concentration and energy of the system are found in the ground state. Metal-insulator transitions in the model at the change of bandwidth or temperature are investigated. The results obtained are used for interpretation of some experimental data in narrow-band materials. В данiй роботi електроннi кореляцiї у вузьких енергетичних зонах вивчаються в рамках моделi Габбарда. За допомогою нового двополюсного наближення знайдено одночастинкову функцiю Грiна та енергетичний спектр у парамагнiтному станi при половинному заповненнi. В основному станi знайдено аналiтичнi вирази для ширини енергетичної щiлини, концентрацiї полярних станiв та енергiї системи. Дослiджено переходи метал-дiелектрик при змiнi ширини зони та при змiнi температури. Отриманi результати використанi для iнтерпретацiї деяких експериментальних даних для вузькозонних матерiалiв. 2000 Article Electron correlations in narrow energy bands: ground state energy and metal-insulator transition / L. Didukh, Yu. Skorenkyy // Condensed Matter Physics. — 2000. — Т. 3, № 4(24). — С. 787-798. — Бібліогр.: 27 назв. — англ. 1607-324X DOI:10.5488/CMP.3.4.787 PACS: 71.28.+d, 71.27.+a, 71.10.Fd, 71.30.+h http://dspace.nbuv.gov.ua/handle/123456789/120984 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 electron correlations in narrow energy bands are examined within the
framework of the Hubbard model. The single-particle Green function and
energy spectrum are obtained in a paramagnetic state at half-filling by
means of a new two-pole approximation. Analytical expressions for the energy gap, polar states concentration and energy of the system are found in
the ground state. Metal-insulator transitions in the model at the change of
bandwidth or temperature are investigated. The results obtained are used
for interpretation of some experimental data in narrow-band materials. |
| format |
Article |
| author |
Didukh, L. Skorenkyy, Yu. |
| spellingShingle |
Didukh, L. Skorenkyy, Yu. Electron correlations in narrow energy bands: ground state energy and metal-insulator transition Condensed Matter Physics |
| author_facet |
Didukh, L. Skorenkyy, Yu. |
| author_sort |
Didukh, L. |
| title |
Electron correlations in narrow energy bands: ground state energy and metal-insulator transition |
| title_short |
Electron correlations in narrow energy bands: ground state energy and metal-insulator transition |
| title_full |
Electron correlations in narrow energy bands: ground state energy and metal-insulator transition |
| title_fullStr |
Electron correlations in narrow energy bands: ground state energy and metal-insulator transition |
| title_full_unstemmed |
Electron correlations in narrow energy bands: ground state energy and metal-insulator transition |
| title_sort |
electron correlations in narrow energy bands: ground state energy and metal-insulator transition |
| publisher |
Інститут фізики конденсованих систем НАН України |
| publishDate |
2000 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/120984 |
| citation_txt |
Electron correlations in narrow energy bands: ground state energy and metal-insulator transition / L. Didukh, Yu. Skorenkyy // Condensed Matter Physics. — 2000. — Т. 3, № 4(24). — С. 787-798. — Бібліогр.: 27 назв. — англ. |
| series |
Condensed Matter Physics |
| work_keys_str_mv |
AT didukhl electroncorrelationsinnarrowenergybandsgroundstateenergyandmetalinsulatortransition AT skorenkyyyu electroncorrelationsinnarrowenergybandsgroundstateenergyandmetalinsulatortransition |
| first_indexed |
2023-10-18T20:38:39Z |
| last_indexed |
2023-10-18T20:38:39Z |
| _version_ |
1796150737127866368 |