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

Freire, Fernando Oliveira; Macedo, Cláudio Andrade

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Campo DC	Valor	Idioma
dc.contributor.author	Freire, Fernando Oliveira	-
dc.contributor.author	Macedo, Cláudio Andrade	-
dc.date.accessioned	2025-04-02T21:11:29Z	-
dc.date.available	2025-04-02T21:11:29Z	-
dc.date.issued	2010	-
dc.identifier.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.	pt_BR
dc.identifier.issn	1742-6596	-
dc.identifier.issn	1742-6588	-
dc.identifier.uri	https://ri.ufs.br/jspui/handle/riufs/21529	-
dc.language	eng	pt_BR
dc.publisher	IOP Publishing	pt_BR
dc.relation.ispartof	Journal of Physics: Conference Series	pt_BR
dc.subject	Hubbard model	eng
dc.title	Properties of the one-dimensional half-filled-band extended Hubbard model	pt_BR
dc.type	Trabalhos em Eventos	pt_BR
dc.identifier.license	Creative Commons Atribuição 4.0 Internacional (CC BY 4.0)	pt_BR
dc.description.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.	pt_BR
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