Antiferromagnetism in the 2D Hubbard model: phase transition and local quantities

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We present a first study of the antiferromagnetic state in the 2D t-t'-U model at finite temperatures by the composite operator method, providing simultaneously a fully self-consistent treatment of the paramagnetic and the AF phase. Near half-filling the critical value of the Coulomb repulsion as a function of t' and the temperature dependence of the magnetization and of the internal energy per site have been studied.
2 pages, 2 figures

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/96744

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0210026
 http://arxiv.org/abs/cond-mat/0210026
 Physica B 284, 1577 (2000)
 doi:10.1016/S0921-4526(99)02831-8

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arXiv