Strong coupling Hartree-Fock approximation in the dynamical mean-field theory
In the limit of infinite spatial dimensions, a thermodynamically consistent theory, which is valid for arbitrary value of the Coulombic interaction ( U < ∞ ), is built for the Hubbard model when the total auxiliary single-site problem exactly splits into four subspaces with different “vacuum s...
Збережено в:
| Дата: | 2001 |
|---|---|
| Автор: | |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2001
|
| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/119753 |
| Теги: |
Додати тег
Немає тегів, Будьте першим, хто поставить тег для цього запису!
|
| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Strong coupling Hartree-Fock approximation in the dynamical mean-field theory / A.M. Shvaika // Condensed Matter Physics. — 2001. — Т. 4, № 1(25). — С. 85-92. — Бібліогр.: 16 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | In the limit of infinite spatial dimensions, a thermodynamically consistent
theory, which is valid for arbitrary value of the Coulombic interaction ( U <
∞ ), is built for the Hubbard model when the total auxiliary single-site problem
exactly splits into four subspaces with different “vacuum states”. Some
analytical results are given for the Hartree-Fock approximation when the 4-
pole structure for Green’s function is obtained: two poles describe contribution
from the Fermi liquid component, which is ferromagnetic and dominant
for small electron and hole concentrations (“overdoped case” of high- Tc ’s),
whereas other two describe contribution from the non-Fermi liquid, which
is antiferromagnetic and dominant close to half filling (“underdoped case”). |
|---|