Metallic ferromagnetism in the systems with strongly correlated electrons
The present paper considers the ground state ferromagnetic ordering in narrow-band models with strongly correlated electrons, in particular, in a single-band generalized Hubbard model with correlated hopping and interatomic exchange interaction, as well as in a double orbitally degenerate Hubbar...
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| Дата: | 2005 |
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| Автори: | , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2005
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/119750 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Metallic ferromagnetism in the systems with strongly correlated electrons / L. Didukh, O. Kramar // Condensed Matter Physics. — 2005. — Т. 8, № 3(43). — С. 547–564. — Бібліогр.: 49 назв. — англ. |
Репозитарії
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irk-123456789-1197502017-06-09T03:04:33Z Metallic ferromagnetism in the systems with strongly correlated electrons Didukh, L. Kramar, O. The present paper considers the ground state ferromagnetic ordering in narrow-band models with strongly correlated electrons, in particular, in a single-band generalized Hubbard model with correlated hopping and interatomic exchange interaction, as well as in a double orbitally degenerate Hubbard model with correlated hopping. The effective Hamiltonians of these models are treated by means of variants of generalized Hartree-Fock approximations, in which the quasi-particle energy spectra are obtained. The ground state energy, critical electron concentration and magnetization are calculated for some types of density of states. The mechanisms of ferromagnetic ordering stability in the narrow-band materials are discussed. В статтi дослiджено феромагнiтне впорядкування в основному станi у вузькозонних моделях з сильно скорельованими електронами, зокрема, в узагальненiй невиродженiй моделi Габбарда з корельованим переносом та мiжатомною обмiнною взаємодiєю, та в узагальненiй двократно орбiтально виродженiй моделi Габбарда з корельованим переносом. Для дослiдження ефективних гамiльтонiанiв вказаних систем застосовано варiанти узагальненого наближення Гартрi-Фока, на основi яких отримано одночастинковi енергетичнi спектри моделей. Для деяких форм густин станiв, що вiдповiдають певним типам ґраток, проведено розрахунок енергiї основного стану, намагнiченостi та критичних концентрацiй електронiв, при яких магнiтний момент виникає та досягає свого насичення. Обговорено можливi механiзми стабiлiзацiї феромагнiтного впорядкування в реальних вузькозонних матерiалах. 2005 Article Metallic ferromagnetism in the systems with strongly correlated electrons / L. Didukh, O. Kramar // Condensed Matter Physics. — 2005. — Т. 8, № 3(43). — С. 547–564. — Бібліогр.: 49 назв. — англ. 1607-324X PACS: 71.20, 71.10.Fd, 75.10.b, 75.20.En DOI:10.5488/CMP.8.3.547 http://dspace.nbuv.gov.ua/handle/123456789/119750 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 present paper considers the ground state ferromagnetic ordering in
narrow-band models with strongly correlated electrons, in particular, in a
single-band generalized Hubbard model with correlated hopping and interatomic
exchange interaction, as well as in a double orbitally degenerate
Hubbard model with correlated hopping. The effective Hamiltonians of
these models are treated by means of variants of generalized Hartree-Fock
approximations, in which the quasi-particle energy spectra are obtained.
The ground state energy, critical electron concentration and magnetization
are calculated for some types of density of states. The mechanisms of ferromagnetic
ordering stability in the narrow-band materials are discussed. |
| format |
Article |
| author |
Didukh, L. Kramar, O. |
| spellingShingle |
Didukh, L. Kramar, O. Metallic ferromagnetism in the systems with strongly correlated electrons Condensed Matter Physics |
| author_facet |
Didukh, L. Kramar, O. |
| author_sort |
Didukh, L. |
| title |
Metallic ferromagnetism in the systems with strongly correlated electrons |
| title_short |
Metallic ferromagnetism in the systems with strongly correlated electrons |
| title_full |
Metallic ferromagnetism in the systems with strongly correlated electrons |
| title_fullStr |
Metallic ferromagnetism in the systems with strongly correlated electrons |
| title_full_unstemmed |
Metallic ferromagnetism in the systems with strongly correlated electrons |
| title_sort |
metallic ferromagnetism in the systems with strongly correlated electrons |
| publisher |
Інститут фізики конденсованих систем НАН України |
| publishDate |
2005 |
| url |
http://dspace.nbuv.gov.ua/handle/123456789/119750 |
| citation_txt |
Metallic ferromagnetism in the systems with strongly correlated electrons / L. Didukh, O. Kramar // Condensed Matter Physics. — 2005. — Т. 8, № 3(43). — С. 547–564. — Бібліогр.: 49 назв. — англ. |
| series |
Condensed Matter Physics |
| work_keys_str_mv |
AT didukhl metallicferromagnetisminthesystemswithstronglycorrelatedelectrons AT kramaro metallicferromagnetisminthesystemswithstronglycorrelatedelectrons |
| first_indexed |
2023-10-18T20:35:20Z |
| last_indexed |
2023-10-18T20:35:20Z |
| _version_ |
1796150593174110208 |