MAGNETIC-PROPERTIES OF THE 2-DIMENSIONAL HUBBARD-MODEL

被引：79
|
作者：
CHEN, L [1 ]
BOURBONNAIS, C [1 ]
LI, T [1 ]
TREMBLAY, AMS [1 ]
机构：
[1] UNIV SHERBROOKE,CTR RECH PHYS SOLIDE,SHERBROOKE J1K 2R1,QUEBEC,CANADA
来源：
PHYSICAL REVIEW LETTERS | 1991年 / 66卷 / 03期
关键词：
D O I：
10.1103/PhysRevLett.66.369
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
引用
收藏
页码：369 / 372
页数：4
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