线性磁场作用下一维铁磁链的孤子激发  

Solitons in One-Dimensional Heisenberg Ferromagnetic Chain with Linear Magnetic Field

作　　者：莫子杰 陈浩 王瑞强 

机构地区：[1]华南师范大学物理与电信工程学院广东省量子调控工程与材料重点实验室,广州510006

出　　处：《华南师范大学学报（自然科学版）》2017年第5期18-24,共7页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(11474106)

摘　　要：研究了在线性磁场作用下,一维铁磁链的2种孤子激发.分别导出2个不同修正的非线性薛定谔方程,可以得到各自所激发的孤子解.此2种孤子激发结果均表明,在增加线性磁场后,孤子的外形与有效质量并不受到影响,但孤子的运动模式却发生改变,从一般的匀速运动变为匀变速运动.而且在线性磁场作用下孤子的能量出现了定域分布,随位置的不同而不同.由此发现,引入线性磁场的普遍意义在于,可使一维铁磁链中的孤子激发和移动受到更好的控制,同时不破坏孤子的稳定性.Two kinds of soliton excitations in 1 D ferromagnetic chain with linear magnetic field are considered. By solving two different modified nonlinear Schrdinger equations,the soliton solutions excited by them are obtained.The two obtained soliton solutions show that linear term of magnetic field has no influence on the shape and effective mass of each soliton,but changes the motional mode from uniformly motion to uniformly variable motion. Moreover,the energy of soliton appears the localized distribution after introducing the linear magnetic field. Introducing linear magnetic can make the excitation and motion of soliton more controllable without destroying the stability in 1 D ferromagnetic chain.

关 键 词：一维铁磁链 孤子 线性磁场 非线性薛定谔方程 

分 类 号：O482.51[理学—固体物理] O175.14[理学—物理]