摘要
The coupled soliton excitations in an alternating Heisenberg ferromagnetic chain with a small magnon band gap are considered. Based on a quasi-discrete multiple scale approach, a set of coupled mode equations is derived which describes the dynamics of strongly coupled acoustic upper cut-off and optical lower cut-off modes. Coupled magnetic band gap soliton solutions are explicitly provided and their frequency properties are discussed.
作者
ZHU Shan-Hua
HUANG Guo-Xiang
朱善华;黄国翔(Key Laboratory for Optical and Magnetic Resonance Spectroscopy and Department of Physics,East China Normal University,Shanghai 200062;Physics Group,Zhuzhou Institute of Technology,Zhuzhou 412008)
基金
Supported by the Trans-Century Training Programme Foundation for Talents by the Education Ministry and the National Natural Science Foundation of China under Grant No.19975019.
