Superconducting, ferromagnetic and antiferromagnetic phases in the t-t′ Hubbard model

被引：39

作者：

Alvarez, JV

Gonzalez, J

Guinea, F

Vozmediano, MAH

机构：

[1] Univ Carlos III Madrid, Dept Matemat, Madrid 28913, Spain

[2] CSIC, Inst Estructura Mat, E-28006 Madrid, Spain

[3] CSIC, Inst Ciencia Mat, E-28049 Madrid, Spain

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1998年 / 67卷 / 06期

关键词：

correlated electrons; Hubbard t-t ' model; renormalization group;

D O I：

10.1143/JPSJ.67.1868

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We apply a renormalization group approach to the determination of the phase diagram of the t - t' Hubbard model at the Van Hove filling; as function of t'/t, for small values of U/t. The model presents ferromagnetic, antiferromagnetic and d-wave superconducting phases. Antiferromagnetism and d-wave superconductivity arise from the same interactions, and compete in the same region of parameter space.

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页码：1868 / 1871

页数：4

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