Ordered phases in the extended Hubbard model

Lagos, Roberto E. [UNESP]

Artigo

Registro en:

http://dx.doi.org/10.1016/0921-4526(94)91828-7

Physica B: Physics of Condensed Matter, v. 199-200, n. C, p. 336-337, 1994.

0921-4526

http://hdl.handle.net/11449/132377

10.1016/0921-4526(94)91828-7

2-s2.0-0028760648

https://repositorioslatinoamericanos.uchile.cl/handle/2250/8781655

Autor

Lagos, Roberto E. [UNESP]

Institución

Universidade Paulista Júlio de Mesquita Filho (Brasil)

Resumen

A novel method to probe the diverse phases for the extended Hubbard model (EHM), including the correlated hopping term, is presented. We extend an effective medium approach [1] to a bipartite lattice, allowing for charge- and/or spin-ordered phases. We calculate the necessary correlation functions to build the EHM phase diagram.

Departamento de Fisica-IGCE Universidade Estadual Paulista (UNESP), Caixa Postal 178, 13500-230 Rio Claro, Sao Paulo

Materias

Correlation methods

Crystal lattices

Mathematical models

Mathematical operators

Matrix algebra

Phase diagrams

Extended Hubbard model

Greens function

Tight binding Hamiltonian

Order disorder transitions

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