STABILITY OF THE SATURATED FERROMAGNETIC STATE IN THE ONE-BAND HUBBARD-MODEL

被引：59
|
作者：
BARBIERI, A
RIERA, JA
YOUNG, AP
机构：
来源：
PHYSICAL REVIEW B | 1990年 / 41卷 / 16期
关键词：
D O I：
10.1103/PhysRevB.41.11697
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We discuss the stability of the saturated ferromagnetic state of the one-band Hubbard model against a single spin flip in the limit of infinite on-site repulsion. We consider the case where the number of holes Nh, can be large but satisfies the condition NhlnN, in two dimensions, (NhN1/3 in three dimensions) where N is the number of spins. We show that the Nagaoka state is locally stable, except for certain small values of Nh for which there is an instability at long wavelengths. © 1990 The American Physical Society.
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页码：11697 / 11700
页数：4
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