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Effect of the Next Nearest Neighbour Hopping on the Antiferromagnetic Properties of a Hubbard Model with Repulsion
Author(s) -
Granada J.C.,
Vivas E.H.
Publication year - 2000
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 - 10.1002/1521-3951(200007)220:1<471::aid-pssb471>3.0.co;2-t
Subject(s) - antiferromagnetism , condensed matter physics , hubbard model , physics , nearest neighbour , statistical physics , computer science , artificial intelligence , superconductivity
In the frame of the formalism of functional integration we consider a Hubbard model with repulsion by taking into account the next nearest neighbour hopping. It is shown that for sufficiently small temperatures and doping parameter, the system is antiferromagnetically ordered. General expressions for the order parameter are obtained.