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
收藏
页码：13838 / 13846
页数：9
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