Realization of Strong Coupling Fixed Point in Multilevel Kondo Models

被引：21

作者：

Hattori, Kazumasa ^{[1
]}

Hirayama, Yosuke ^{[1
]}

Miyake, Kazumasa ^{[1
]}

机构：

[1] Osaka Univ, Grad Sch Engn Sci, Dept Mat Engn Sci, Div Mat Phys, Toyonaka, Osaka 5608531, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2006年 / 75卷

基金：

日本学术振兴会;

关键词：

Kondo effect; rattling; multi-level system;

D O I：

10.1143/JPSJS.75S.238

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Impurity four-and six-level Kondo model, in which an ion is tunneling among four-and six-stable points and interacting with surrounding conduction electrons, are investigated by using the perturbative and numerical renormalization group methods. It is shown that purely orbital Kondo effects occur at low temperatures in these systems which are direct generalizations of the Kondo effect in the so-called two-level system. This result offers a good explanation for the enhanced and magnetically robust Sommerfeld coefficient observed in SmOs4Sb12 and some other filled-skutterudites.

引用

页码：238 / 240

页数：3

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