FERRIMAGNETIC LONG-RANGE ORDER OF THE HUBBARD-MODEL

被引：73

作者：

SHEN, SQ ^{[1
]}

QIU, ZM ^{[1
]}

TIAN, GS ^{[1
]}

机构：

[1] BEIJING UNIV,DEPT PHYS,BEIJING 100871,PEOPLES R CHINA

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 72卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.72.1280

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

In this paper, we show rigorously that there exists the ferrimagnetic long-range order in the ground state of the positive-U Hubbard model at half filling on some bipartite lattices. When N-A > N-B (N-A and N-B are the total site numbers of two sublattices A and B), except for the ferromagnetism which was found by Lieb [Phys. Rev, Lett. 62, 1201 (1989)], there also exists the antiferromagnetic long-range order in the ground state. This result only requires U > O and is independent of the dimension of the lattices.

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页码：1280 / 1282

页数：3

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