A nonlinear lattice model for Heisenberg helimagnet and spin wave instabilities

被引：8

作者：

Felcy, A. Ludvin ^{[1
]}

Latha, M. M. ^{[2
]}

Vasanthi, C. Christal ^{[2
]}

机构：

[1] St Xaviers Catholic Coll Engn, Dept Phys, Chunkankadai 629003, India

[2] Womens Christian Coll, Dept Phys, Nagercoil 629001, India

来源：

PHYSICA B-CONDENSED MATTER | 2016年 / 499卷

关键词：

Heisenberg helimagnet; Soliton; Modulational Instability; SOLITON EXCITATIONS; FIELD; FERROMAGNET; DEPENDENCE; CHAIN;

D O I：

10.1016/j.physb.2016.07.005

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study the dynamics of a Heisenberg helimagnet by presenting a square lattice model and proposing the Hamiltonian associated with it. The corresponding equation of motion is constructed after averaging the Hamiltonian using a suitable wavefunction. The stability of the spin wave is discussed by means of Modulational Instability (MI) analysis. The influence of various types of inhomogeneities in the lattice is also investigated by improving the model. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：49 / 56

页数：8

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