Effects of van Hove singularities on magnetism and superconductivity in the t-t′ Hubbard model:: A parquet approach -: art. no. 165107

被引：64

作者：

Irkhin, VY ^{[1
]}

Katanin, AA ^{[1
]}

Katsnelson, MI ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ekaterinburg 620219, Russia

来源：

PHYSICAL REVIEW B | 2001年 / 64卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.64.165107

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The t-t' Hubbard model for the Fermi level near the van Hove singularity is considered within the renormalization group and parquet approaches. Interplay of ferromagnetic, antiferromagnetic, and superconducting channels is investigated, and the phase diagram of the model is constructed. In comparison with previous approaches, the account of ferromagnetic fluctuations suppresses superconducting pairing and, vice versa, the influence of the Cooper channel decreases the Curie temperature, so that the Stoner criterion is inapplicable even qualitatively.

引用

页数：11

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