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On Antiferromagnetism, Charge Density Wave, and Superconductivity in the Extended Hubbard Model Studied by Means of the Slave‐Boson Method
Author(s) -
Bulka B. R.
Publication year - 1993
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.2221800212
Subject(s) - antiferromagnetism , slave boson , hubbard model , superconductivity , physics , condensed matter physics , boson , spin density wave , ground state , charge density wave , electron , charge (physics) , invariant (physics) , t j model , quantum mechanics
The ground state of the extended Hubbard model is studied. The stability conditions for the antiferromagnetic, the charge density wave, and the superconducting state are analyzed in the same slave‐boson representation, which is spin‐ and charge‐rotationally invariant. It is found that at the concentration of electrons n o = 1 the stable solutions are similar in form.