Weakly correlated electrons on a square lattice: A renormalization group theory

被引：74

作者：

Zanchi, D ^{[1
]}

Schulz, HJ

机构：

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

[2] Free Univ Berlin, Inst Theoret Phys, D-14195 Berlin, Germany

来源：

EUROPHYSICS LETTERS | 1998年 / 44卷 / 02期

关键词：

D O I：

10.1209/epl/i1998-00462-x

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the weakly interacting Hubbard model on the square lattice using a one-loop renormalization group approach. The transition temperature T-c between the metallic and (nearly) ordered states is found. In the parquet regime (T-c much greater than \mu\), the dominant correlations at temperatures below T-c are antiferromagnetic, while in the BCS regime (T-c much less than \mu\) at T-c the d-wave singlet pairing susceptibility is most divergent.

引用

页码：235 / 241

页数：7