Influence of the Kondo effect on spin density waves in the Kondo lattice model

被引：0

作者：

Peters, Robert ^{[1
]}

Kawakami, Norio ^{[2
]}

机构：

[1] RIKEN, Computat Condensed Matter Phys Lab, Wako, Saitama 3510198, Japan

[2] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2016年 / 400卷

关键词：

Kondo lattice model; Spin density waves; Kondo effect; Dynamical mean field theory; DYNAMICAL MEAN-FIELD; RENORMALIZATION-GROUP; SYSTEMS; DIMENSIONS;

D O I：

10.1016/j.jmmm.2015.07.104

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We analyze the influence of the Kondo effect on the spin density wave (SDW) phase in the Kondo lattice model (KLM) for a two-dimensional square lattice. We demonstrate that in the isotropic KLM the SDW phase is divided into a small Fermi-surface region and a large Fermi-surface region and vanishes for strong interaction. On the other hand, in the Ising-spin KLM, where the Kondo effect is absent, we only find a small Fermi-surface SDW phase, which does not vanish at strong coupling. This demonstrates the importance of the Kondo effect for the large Fermi surface SDW phase as well as for the existence of the quantum critical transition between the SDW phase and the paramagnetic phase. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：47 / 51

页数：5

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