NONLINEAR EXCITATIONS IN AN ORDER-PARAMETER-PRESERVING ANTIFERROMAGNET

被引：3
|
作者：
LIU, WM
WANG, H
BAI, FX
ZHOU, BL
机构：
[1] CCAST,WORLD LAB,BEIJING,PEOPLES R CHINA
[2] ACAD SINICA,INST MET RES,LAB 5,SHENYANG 110015,PEOPLES R CHINA
[3] YUNNAN NORMAL UNIV,KUNMING 650092,PEOPLES R CHINA
来源：
PHYSICA STATUS SOLIDI B-BASIC RESEARCH | 1994年 / 182卷 / 02期
关键词：
D O I：
10.1002/pssb.2221820222
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Introducing the Dyson-Maleev transformation and the coherent state ansatz, soliton-type nonlinear excitations in an order-parameter-preserving antiferromagnet (OPP-AFM) are investigated with help of the method of multiple scales combined with the long-wavelength approximation. The soliton frequencies enter into the frequency gap of the linear dispersion curve and denote the nonlinear localized modes of this system. These modes which produce the nonlinearity can be viewed as a two-magnon bound state.
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页码：445 / 452
页数：8
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