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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; Liu, WM , CHINA CTR ADV SCI & TECHNOL, WORLD LAB, POB 8730, BEIJING 100080, PEOPLES R CHINA.
1997
发表期刊ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER
ISSN0722-3277
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.
部门归属ACAD SINICA, INST THEORET PHYS, BEIJING 100080, PEOPLES R CHINA; ACAD SINICA, INST APPL MATH, BEIJING 100080, PEOPLES R CHINA; ACAD SINICA, INST PHYS, BEIJING 100080, PEOPLES R CHINA; GUANGZHOU NORMAL COLL, DEPT PHYS, GUANGZHOU 510400, PEOPLES R CHINA; WUHAN UNIV, DEPT PHYS, WUHAN 430072, PEOPLES R CHINA
关键词Landau-lifschitz Equation Riemann Boundary-problem Linear Schrodinger-equation Inverse Scattering Problem Easy-plane Soliton-solutions Excitations Transformation Equivalence Ferromagnet
学科领域Physics
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收录类别SCI
WOS记录号WOS:A1997WZ51800017
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被引频次:3[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12483
专题理论物理所1978-2010年知识产出
通讯作者Liu, WM , CHINA CTR ADV SCI & TECHNOL, WORLD LAB, POB 8730, BEIJING 100080, PEOPLES R CHINA.
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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,&Liu, WM , CHINA CTR ADV SCI & TECHNOL, WORLD LAB, POB 8730, BEIJING 100080, PEOPLES R CHINA..(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.
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