Strong-coupling expansion for the Hubbard model

被引：71

作者：

Pairault, S ^{[1
]}

Senechal, D

Tremblay, AMS

机构：

[1] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 2R1, Canada

[2] Univ Sherbrooke, Ctr Rech Phys Solide, Sherbrooke, PQ J1K 2R1, Canada

[3] Univ Paris Sud, Phys Solides Lab, F-91405 Orsay, France

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.80.5389

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A strong-coupling expansion for models of correlated electrons in any dimension is presented. The method is applied to the Hubbard model in d dimensions and compared with numerical results in d = 1. Third order expansion of the Green's function suffices to exhibit both the Mott metal-insulator transition and a low-temperature regime where antiferromagnetic correlations are strong. It is predicted that some of the weak photoemission signals observed in one-dimensional systems such as SrCuO2 should become stronger as temperature increases away from the spin-charge separated state.

引用

页码：5389 / 5392

页数：4

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