Properties of the one-dimensional half-filled-band extended Hubbard model

Freire, Fernando Oliveira; Macedo, Cláudio Andrade

Use este identificador para citar ou linkar para este item: https://ri.ufs.br/jspui/handle/riufs/21529

Tipo de Documento:	Trabalhos em Eventos
Título:	Properties of the one-dimensional half-filled-band extended Hubbard model
Autor(es):	Freire, Fernando Oliveira Macedo, Cláudio Andrade
Data do documento:	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.
Palavras-chave:	Hubbard model
ISSN:	1742-6596 1742-6588
Parte de :	Journal of Physics: Conference Series
Idioma:	eng
Instituição/Editora:	IOP Publishing
Citação:	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.
Licença:	Creative Commons Atribuição 4.0 Internacional (CC BY 4.0)
URI:	https://ri.ufs.br/jspui/handle/riufs/21529
Aparece nas coleções:	DFI - Artigos de periódicos DFI - Trabalhos apresentados em eventos

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