Manifestation of the Upper Hubbard band in the 2D Hubbard model at low electron density
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Manifestation of the Upper Hubbard band in the 2D Hubbard model at low electron density
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| Creator |
Kagan, M.Yu.
Val’kov, V.V. Woelfle, P. |
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| Subject |
Низкоразмерные структуры
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| Description |
We consider the 2D Hubbard model in the strong-coupling case (U >> W) and at low electron density (nd² << 1). We find an antibound state as a pole in the two-particle T-matrix. The contribution of this pole in the self-energy reproduces a two-pole structure in the dressed one-particle Green-function similar to the Hubbard-I approximation. We also discuss briefly the Engelbrecht-Randeria mode which corresponds to the pairing of two holes below the bottom of the band for U >> W and low electron density. Both poles produce nontrivial corrections to Landau Fermi-liquid picture already at low electron density but do not destroy it in 2D.
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| Date |
2017-05-31T06:58:39Z
2017-05-31T06:58:39Z 2011 |
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| Type |
Article
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| Identifier |
Manifestation of the Upper Hubbard band in the 2D Hubbard model at low electron density / M.Yu. Kagan, V.V. Val’kov, P. Woelfle // Физика низких температур. — 2011. — Т. 37, № 9-10. — С. 1046–1052. — Бібліогр.: 16 назв. — англ.
0132-6414 PACS: 71.10.Fd http://dspace.nbuv.gov.ua/handle/123456789/118762 |
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| Language |
en
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| Relation |
Физика низких температур
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| Publisher |
Фізико-технічний інститут низьких температур ім. Б.І. Вєркіна НАН України
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