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Solitons in a uniaxial anisotropic Heisenberg spin chain with Gilbert damping in an external magnetic field
Liu, WM; Wang, XB; Pu, FC; Huang, NN; Liu, WM , ACAD SINICA, INST THEORET PHYS, POB 2735, BEIJING 100080, PEOPLES R CHINA.
1997
发表期刊PHYSICAL REVIEW E
ISSN1063-651X
卷号55期号:2页码:1375-1394
摘要Using the stereographic projection of the unit sphere of the spin field onto a complex plane for the equations of motion in a uniaxial anisotropic Heisenberg spin chain with Gilbert damping in an external magnetic field, the effect of the magnetic field for the integrability of the system is discussed. The effect of the Gilbert damping is also analyzed. Then, introducing an auxiliary parameter, the Lax equations for the Darboux matrices are generated recursively. The Jest solutions satisfy the corresponding Lax equations if constants are suitably chosen. The exact soliton solutions are then investigated. These results show that the solitary waves depend essentially on two velocities that describe a spin configuration deviated from a homogeneous magnetization, while the depths and widths of surface of solitary waves vary periodically with time. The center of an inhomogeneity moves with a constant velocity, while the shape of a soliton also changes with another constant velocity and it is not symmetrical with respect to the center. The z component of the total magnetic momentum and the total magnetic momentum vary with time. The asymptotic behavior of multisoliton solutions is also given.
部门归属CHINA CTR ADV SCI & TECHNOL, WORLD LAB, BEIJING 100080, PEOPLES R CHINA; ACAD SINICA, INST PHYS, BEIJING 100080, PEOPLES R CHINA; SHANXI UNIV, INST THEORET PHYS, TAIYUAN 030006, PEOPLES R CHINA; GUANGZHOU TEACHERS COLL, DEPT PHYS, GUANGZHOU 510400, PEOPLES R CHINA; WUHAN UNIV, DEPT PHYS, WUHAN 430072, PEOPLES R CHINA
关键词Landau-lifschitz Equation Nonlinear Schrodinger-equation Riemann Boundary-problem Inverse Scattering Problem One-dimensional Magnets Easy-plane Ferromagnetic Chains Magnon Localization Excitations Dynamics
学科领域Physics
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收录类别SCI
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/12514
专题理论物理所1978-2010年知识产出
通讯作者Liu, WM , ACAD SINICA, INST THEORET PHYS, POB 2735, BEIJING 100080, PEOPLES R CHINA.
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Liu, WM,Wang, XB,Pu, FC,et al. Solitons in a uniaxial anisotropic Heisenberg spin chain with Gilbert damping in an external magnetic field[J]. PHYSICAL REVIEW E,1997,55(2):1375-1394.
APA Liu, WM,Wang, XB,Pu, FC,Huang, NN,&Liu, WM , ACAD SINICA, INST THEORET PHYS, POB 2735, BEIJING 100080, PEOPLES R CHINA..(1997).Solitons in a uniaxial anisotropic Heisenberg spin chain with Gilbert damping in an external magnetic field.PHYSICAL REVIEW E,55(2),1375-1394.
MLA Liu, WM,et al."Solitons in a uniaxial anisotropic Heisenberg spin chain with Gilbert damping in an external magnetic field".PHYSICAL REVIEW E 55.2(1997):1375-1394.
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