Magnetic-properties of the 2-dimensional Hubbard-model
|Titre||Magnetic-properties of the 2-dimensional Hubbard-model|
|Type de publication||Journal Article|
|Auteurs||Chen L, Bourbonnais C, Li T, Tremblay A-MS|
|Journal||Physical Review Letters|
Monte Carlo simulations of the magnetic structure factor of the two-dimensional Hubbard model are in qualitative agreement with the slave-boson approach and, in the low-temperature intermediate-coupling limit, they are in even better quantitative agreement with the random-phase approximation, as long as a renormalized repulsion U is used. This renormalization comes from maximally crossed diagrams, which account for two-body short-range correlations. One of the consequences is that Stoner ferromagnetism is not a generic property of the two-dimensional one-band Hubbard model.