SELF-CONSISTENT DYNAMIC THEORY FOR THE ANDERSON LATTICE

被引：64

作者：

KIM, CI ^{[1
]}

KURAMOTO, Y ^{[1
]}

KASUYA, T ^{[1
]}

机构：

[1] TOHOKU UNIV,DEPT APPL PHYS,SENDAI,MIYAGI 980,JAPAN

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1990年 / 59卷 / 07期

关键词：

Anderson lattice; Fermi liquid; heavy fermion; Kondo effect; self-consistent perturbation theory;

D O I：

10.1143/JPSJ.59.2414

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

This paper presents formulation and results of a self-consistent dynamical theory which can describe the crossover from the local-moment state to the heavy-fermion state with decreasing temperatures. The theory is an extension of the non-crossing approximation (NCA) for the single-site model and incorporates the intersite interaction via self-consistent modification of the conduction-electron propagator. Detailed numerical results for single-particle excitations are presented which show that (i) the cooperative enhancement of the Kondo resonance occurs at temperatures higher than the Kondo temperature TK; (ii) a pseudogap develops around the energy of the Kondo resonance with decreasing temperatures; (iii) no new energy scale other than TK is generated in the heavy-fermion state. © 1990, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.

引用

页码：2414 / 2425

页数：12