Supersymmetric approach to heavy-fermion systems

被引：9

作者：

Pepin, C

Lavagna, M

机构：

[1] Commissariat à l'Energie Atomique, Département de Recherche Fondamentale sur la Matière Condensée, SPSMS, F-38054 Grenoble Cedex 9, 17, rue des Martyrs

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1997年 / 103卷 / 02期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1007/s002570050369

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We present a new supersymmetric approach to the Kondo lattice model in order to describe simultaneously the quasiparticle excitations and the low-energy magnetic fluctuations in heavy-Fermion systems. This approach mixes the fermionic and the bosonic representation of the spin following the standard rules of superalgebra. Our results show the formation of a bosonic band within the hybridization gap reflecting the spin collective modes. The density of states at the Fermi level is strongly renormalized while the Fermi surface sum rule includes n(c) + 1 states. The dynamical susceptibility is made of a Fermi liquid superimposed on a localized magnetism contribution.

引用

页码：259 / 261

页数：3

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