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https://ri.ufs.br/jspui/handle/riufs/21529| Document Type: | Trabalhos em Eventos |
| Title: | Properties of the one-dimensional half-filled-band extended Hubbard model |
| Authors: | Freire, Fernando Oliveira Macedo, Cláudio Andrade |
| Issue Date: | 2010 |
| Resumo : | With the aim of contributing to a better understanding of the finite-temperature properties of low-dimensional strongly correlated systems we study a one-dimensional halffilled-band extended Hubbard model with a term of exchange interaction between neighboring sites. We analyze the temperature dependence of the specific heat, internal energy, entropy, number of doubly occupied sites, magnetic susceptibility, spin-spin correlation functions, and also investigate a detailed diagram of magnetic correlations. We use the method of smallcluster exact diagonalization calculations with the application of the grand canonical ensemble and of extrapolation techniques to the infinite chain. Our results show that the examined model exhibits a rich structure of magnetic properties due to the competition between the onsite Coulombian repulsion and the exchange interaction. |
| Keywords: | Hubbard model |
| ISSN: | 1742-6596 1742-6588 |
| Is part of: | Journal of Physics: Conference Series |
| Language: | eng |
| Publisher / Institution : | IOP Publishing |
| Citation: | FREIRE, F. O.; MACEDO, C. A. Properties of the one-dimensional half-filled-band extended Hubbard model. Journal of Physics: Conference Series, v. 200, 2010. Seção 1. Trabalho apresentado em 18º International Conference on Magnetism, 2009, [Karlsruhe]. Disponível em: https://iopscience.iop.org/article/10.1088/1742-6596/200/1/012108/pdf. Acesso em: 2 abr. 2025. |
| License: | Creative Commons Atribuição 4.0 Internacional (CC BY 4.0) |
| URI: | https://ri.ufs.br/jspui/handle/riufs/21529 |
| Appears in Collections: | DFI - Artigos de periódicos DFI - Trabalhos apresentados em eventos |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| PropertiesHubbardModel.pdf | 370,23 kB | Adobe PDF |  View/Open |
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