FERROMAGNETISM IN THE STRONG-COUPLING REGIME OF THE ONE-DIMENSIONAL KONDO-LATTICE MODEL

被引：95

作者：

SIGRIST, M

TSUNETSUGU, H

UEDA, K

RICE, TM

机构：

[1] SWISS FED INST TECHNOL,CTR INTERDISCIPLINARY PROJECT,CH-8093 ZURICH,SWITZERLAND

[2] UNIV TOKYO,INST SOLID STATE PHYS,TOKYO 106,JAPAN

[3] UNIV TSUKUBA,INST MAT SCI,TSUKUBA 305,JAPAN

来源：

PHYSICAL REVIEW B | 1992年 / 46卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.46.13838

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The ground state of the one-dimensional Kondo lattice model is examined in the strong-coupling regime. An effective Hamiltonian is developed to describe low-energy processes. This leads to a ferromagnetic ground state in this regime for all conduction electron densities. The spin excitations are those of a squeezed spin chain with ferromagnetic Heisenberg exchange coupling. In addition there are quasiparticle excitations, which are discussed in detail only for the case of half filling.

引用

页码：13838 / 13846

页数：9

共 28 条

[1] EXACT SPECTRUM FOR N-ELECTRONS IN THE SINGLE BAND HUBBARD-MODEL [J].