Incommensurate antiferromagnetic fluctuations in the two-dimensional Hubbard model

被引：12

作者：

Krahl, H. C. ^{[1
]}

Friederich, S. ^{[1
]}

Wetterich, C. ^{[1
]}

机构：

[1] Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany

来源：

PHYSICAL REVIEW B | 2009年 / 80卷 / 01期

关键词：

antiferromagnetism; d-wave superconductivity; fluctuations in superconductors; Hubbard model; renormalisation; superconducting transition temperature; RENORMALIZATION-GROUP; MAGNETISM; FIELD; WAVE; FERROMAGNETISM; LA2CUO4; PHASE;

D O I：

10.1103/PhysRevB.80.014436

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Commensurate and incommensurate antiferromagnetic fluctuations in the two-dimensional repulsive t-t(')-Hubbard model are investigated using functional renormalization group equations. For a sufficient deviation from half-filling we establish the existence of local incommensurate order below a pseudocritical temperature T-pc. Fluctuations not accounted for in the mean-field approximation are important-they lower T-pc by a factor approximate to 2.5.

引用

页数：7

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