Exotic Kondo effects in electron-phonon systems

被引：9

作者：

Hotta, Takashi ^{[1
]}

机构：

[1] Japan Atom Energy Agcy, Adv Sci Res Ctr, Ibaraki 3191195, Japan

来源：

PHYSICA B-CONDENSED MATTER | 2008年 / 403卷 / 5-9期

基金：

日本学术振兴会;

关键词：

kondo effect; Anderson model; Jahn-Teller phonon; Holstein phonon;

D O I：

10.1016/j.physb.2007.10.153

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We discuss the Kondo effect in the Anderson model dynamically coupled with two different types of local phonons by using a numerical renormalization group method. For Jahn-Teller phonon, a characteristic temperature T* is found to be monotonically decreased with increasing electron-phonon coupling constant a, while for Holstein phonon, T* is increased with the increase of a and it takes maximum when the Coulomb interaction competes with the phonon-mediated attraction. The Kondo behavior in such a competing region is discussed in detail. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：1371 / 1372

页数：2

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