One- and two-channel Kondo model with logarithmic Van Hove singularity: A numerical renormalization group solution

被引：5

作者：

Zhuravlev, A. K. ^{[1
]}

Anokhin, A. O. ^{[1
]}

Irkhin, V. Yu. ^{[1
]}

机构：

[1] Russian Acad Sci, MN Mikheev Inst Met Phys, Ekaterinburg 620108, Russia

来源：

PHYSICS LETTERS A | 2018年 / 382卷 / 07期

关键词：

Kondo model; Van Hove singularities; Strong correlations; FERMI-LIQUID BEHAVIOR; ANDERSON MODEL; SUSCEPTIBILITY; MAGNETISM; FIELD;

D O I：

10.1016/j.physleta.2017.12.043

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Simple scaling consideration and NRG solution of the one- and two-channel Kondo model in the presence of a logarithmic Van Hove singularity at the Fermi level is given. The temperature dependences of local and impurity magnetic susceptibility and impurity entropy are calculated. The low-temperature behavior of the impurity susceptibility and impurity entropy turns out to be non-universal in the Kondo sense and independent of the s-d coupling J. The resonant level model solution in the strong coupling regime confirms the NRG results. In the two-channel case the local susceptibility demonstrates a non-Fermi liquid power-law behavior. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：528 / 533

页数：6

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