EXACT GROUND-STATES FOR THE HUBBARD-MODEL ON THE KAGOME LATTICE

被引：316

作者：

MIELKE, A

机构：

[1] Inst. fur Theor. Phys., Heidelberg Univ.

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | 1992年 / 25卷 / 16期

关键词：

D O I：

10.1088/0305-4470/25/16/011

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We give a complete and rigorous description of the ground states of the Hubbard model on the Kagome lattice for electron densities n greater-than-or-equal-to 5/3 and U > 0. If 11/6 > n greater-than-or-equal-to 5/3 the system shows a ferromagnetic behaviour at zero temperature. If n is above 11/6 the system is paramagnetic. The proof of these results uses some graph-theoretic methods. The results are applicable to all line graphs of planar lattices, of which the Kagome lattice is an example.

引用

页码：4335 / 4345

页数：11

共 10 条

[1]

Bollobas B, 1979, GRAPH THEORY INTRO C

[2] NONEXISTENCE OF MAGNETIC ORDERING IN ONE-DIMENSIONAL 2-DIMENSIONAL HUBBARD MODEL [J].