ONSAGER-FIELD STUDY OF THE MAGNETISM OF THE HUBBARD-MODEL

Authors
Citation
H. Kaga et M. Cyrot, ONSAGER-FIELD STUDY OF THE MAGNETISM OF THE HUBBARD-MODEL, Physical review. B, Condensed matter, 58(18), 1998, pp. 12267-12270
Citations number
18
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
01631829
Volume
58
Issue
18
Year of publication
1998
Pages
12267 - 12270
Database
ISI
SICI code
0163-1829(1998)58:18<12267:OSOTMO>2.0.ZU;2-#
Abstract
We show that the Onsager-field theory for itinerant systems is also qu ite useful for arbitrary filling of the two-dimensional (2D) and 3D Hu bbard models in the weak to intermediate coupling of U, yielding vario us magnetic properties in agreement with the results of quantum Monte Carlo simulations and the two-particle self-consistent method of Ville et al. Any small doping into the antiferromagnetic ground state of th e half-filled 3D model introduces an incommensurate phase with a signi ficant reduction due to fluctuations. [S0163-1829(98)00242-2].