Nonlinear dynamics of a continuum Heisenberg spin chain with an anisotropy and an external magnetic field

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	Nonlinear dynamics of a continuum Heisenberg spin chain with an anisotropy and an external magnetic field
	Liu, WM ; Yang, SL ; Pu, FC ; Huang, NN
	1997-05-01
发表期刊	ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER
ISSN	0722-3277
卷号	103 期号:1 页码:105-114
摘要	By stereographically projecting the spin vector onto a complex plane in the equations of motion for a continuum Heisenbeg spin chain with an anisotropy (an easy plane and an easy axis) and an external magnetic field, the effect of the magnetic field for integrability of the system is discussed. Then, introducing an auxiliary parameter, the Lax equations for Darboux matrices are generated recursively. By choosing the constants, the Jest solutions are satisfied the corresponding Lax equations. The exact soliton solutions are investigated, then the total magnetic momentum and its z-component are obtained. These results show that the solitary waves depend essentially on two velocities which describe a spin configuration deviating from a homogeneous magnetization, The depths and widths of solitary waves vary periodically with time. The center of an inhomogeneity moves with a constant velocity, while the shape of soliton also changes with another velocity and this shape is not symmetrical with respect to the center. The total magnetic momentum and its z-component vary with time.
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
WOS记录号	WOS:A1997WZ51800017
出版者	SPRINGER
引用统计
文献类型	期刊论文
条目标识符	http://ir.amss.ac.cn/handle/2S8OKBNM/13254
专题	中国科学院数学与系统科学研究院
作者单位	1.ACAD SINICA, INST THEORET PHYS, BEIJING 100080, PEOPLES R CHINA 2.ACAD SINICA, INST APPL MATH, BEIJING 100080, PEOPLES R CHINA 3.ACAD SINICA, INST PHYS, BEIJING 100080, PEOPLES R CHINA 4.GUANGZHOU NORMAL COLL, DEPT PHYS, GUANGZHOU 510400, PEOPLES R CHINA 5.WUHAN UNIV, DEPT PHYS, WUHAN 430072, PEOPLES R CHINA
推荐引用方式 GB/T 7714	Liu, WM,Yang, SL,Pu, FC,et al. Nonlinear dynamics of a continuum Heisenberg spin chain with an anisotropy and an external magnetic field[J]. ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER,1997,103(1):105-114.
APA	Liu, WM,Yang, SL,Pu, FC,&Huang, NN.(1997).Nonlinear dynamics of a continuum Heisenberg spin chain with an anisotropy and an external magnetic field.ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER,103(1),105-114.
MLA	Liu, WM,et al."Nonlinear dynamics of a continuum Heisenberg spin chain with an anisotropy and an external magnetic field".ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER 103.1(1997):105-114.