Magnetic Phases of Strongly Correlated Electrons in a Nearly Half‐Filled Narrow Band | Zendy

Spalek J. | Zendy; Oleá A. M. | Zendy; Chao K. A. | Zendy

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Magnetic Phases of Strongly Correlated Electrons in a Nearly Half‐Filled Narrow Band

Author(s) -

Spalek J.,

Oleá A. M.,

Chao K. A.

Publication year - 1981

Publication title -

physica status solidi (b)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.51

H-Index - 109

eISSN - 1521-3951

pISSN - 0370-1972

DOI - 10.1002/pssb.2221080206

Subject(s) - condensed matter physics , antiferromagnetism , quasiparticle , physics , hamiltonian (control theory) , ground state , ferromagnetism , electron , magnetic moment , hubbard model , phase diagram , decoupling (probability) , electronic correlation , quantum mechanics , superconductivity , phase (matter) , mathematics , mathematical optimization , control engineering , engineering

A canonical perturbation technique is used to investigate a nearly half‐filled nondegenerate generalized Hubbard Hamiltonian a t the strong intraatomic correlation limit. Quasiparticle state and the total energy for various magnetic orderings are obtained using the Green function method with the moment‐conserving decoupling scheme. A ground state magnetic phase diagram with antiferromagnetic, ferromagnetic, and mixed phases is derived and compared to existing results. The dependence of the critical W / U ratio for metal‐nonmetal transition on the interatomic exchange is estimated.

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