A generating functional approach to the sd-model with strong correlations
A Kadanoff-Baym-type generating functional approach, earlier developed by the authors to strongly correlated systems, is applied to the sd-model with strong sd-coupling. Formalism of the Hubbard X -operators was used, and equation for electron Green’s function was derived with functional derivati...
Збережено в:
| 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/123456789/121055 |
| Теги: |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | A generating functional approach to the sd-model with strong correlations / Yu.A. Izyumov, N.I. Chaschin, D.S. Alexeev // Condensed Matter Physics. — 2005. — Т. 8, № 4(44). — С. 801–812. — Бібліогр.: 11 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | A Kadanoff-Baym-type generating functional approach, earlier developed
by the authors to strongly correlated systems, is applied to the sd-model
with strong sd-coupling. Formalism of the Hubbard X -operators was used,
and equation for electron Green’s function was derived with functional derivatives
over external fluctuating fields. Iterations in this equation generate
a perturbation theory near the atomic limit. Hartree-Fock type approximation
is developed within the framework of this theory, and the problem of a
metal–insulator phase transition in sd-model is discussed. |
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