Exact Ground States for Quasi 1D Systems with Hubbard Interaction
Electronic Archive of Sumy State University
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
Exact Ground States for Quasi 1D Systems with Hubbard Interaction
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| Creator |
Kovács, E.
Gulácsi, Zs. |
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| Subject |
Strongly interacting systems
Hubbard model Ferromagnetism Nanowires |
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| Description |
Using a positive semidefinite operator technique we deduced exact ground states for a modified diamond chain described by a non-integrable Hubbard model with on-site repulsion. Our results are valid for arbitrary length of the chain and strength of the Hubbard interaction. For the analyzed parameter space region of the quasi 1D chain structure we found that two flat bands are present in the bare band structure of the system, both for zero and for a fixed value of magnetic field. We obtained ground states of nonmagnetic and ferromagnetic insulator type and studied their physical properties.
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| Publisher |
Видавництво СумДУ
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| Date |
2012-03-28T11:25:23Z
2012-03-28T11:25:23Z 2012 |
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| Type |
Article
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| Identifier |
E. Kovács, Zs. Gulácsi, J. Nano-Electron. Phys. 4 No 1, 01004 (2012)
http://essuir.sumdu.edu.ua/handle/123456789/24886 |
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| Language |
en
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