| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
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|
|---|---|---|
| Page(s) | C8-715 - C8-716 | |
| DOI | https://doi.org/10.1051/jphyscol:19888324 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-715-C8-716
DOI: 10.1051/jphyscol:19888324
1 Laboratoire Louis Néel, C.N.R.S., 166X, 38042 Grenoble Cedex, France
2 Instituto de Fisica, UFRGS 9000 Porto Alegre, Rio Grande do Sul, Brazil.
J. Phys. Colloques 49 (1988) C8-715-C8-716
DOI: 10.1051/jphyscol:19888324
DESTRUCTION OF ANTIFERROMAGNETISM BY VACANCIES FOR THE HUBBARD AND ANDERSON LATTICE MODELS
C. Bastide1, C. Lacroix1 et A. da Rosa Simões21 Laboratoire Louis Néel, C.N.R.S., 166X, 38042 Grenoble Cedex, France
2 Instituto de Fisica, UFRGS 9000 Porto Alegre, Rio Grande do Sul, Brazil.
Abstract
We study the itinerant antiferromagnetism of fermions with hard-core repulsion, like in the weak hopping Anderson lattice or the strong U Hubbard Hamiltonian. It is found that the critical temperature TN decreases very quickly when vacancies are injected. The effect of the dynamic three-sites magnetic interaction is studied.