PROOF OF ANTIFERROMAGNETISM IN THE HALF-FILLED HUBBARD-MODEL IN INFINITE DIMENSIONS

被引:2
|
作者
KOPIETZ, P
机构
[1] Institut für theoretische Physik der Universität Göttingen, D-3400 Göttingen
来源
PHYSICA B | 1994年 / 194卷
关键词
D O I
10.1016/0921-4526(94)90465-0
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We obtain a rigorous condition for the divergence of the staggered susceptibility of the half filled Hubbard model in infinite dimensions by differentiating the exact functional-integral equation for the local Greens function with respect to a staggered magnetic field. In the weak-coupling regime, we make the reasonable assumption that the high temperature phase without broken symmetry is a Fermi liquid, and proof that the system develops long-range antiferromagnetic order at a finite temperature.
引用
收藏
页码:271 / 272
页数:2
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