关键词: 各向异性铁磁自旋链/
明孤子/
暗孤子
English Abstract
Higher-order solitons in an anisotropic Heisenberg spin chain
Xie Yuan-Dong1,21.School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China;
2.Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China
Fund Project:Project supported by the National Natural Science Foundation of China (Grant No. 11274124).Received Date:22 May 2016
Accepted Date:05 July 2016
Published Online:05 October 2016
Abstract:An anisotropic Heisenberg ferromagnetic spin chain model is studied by using Holstain-Primakoff representation. In the semiclassical limit, the exact solutions for bright and dark solitons are found by using the coherent-state method combined with the Holstein-Primakoff bosonic representation of spin operators. These results show that the solutions can be expressed in terms of the elliptic integrals in different parameter regions. Some solutions for dark solitons are the innovation points in this paper.
Keywords: anisotropic ferromagnetic spin chain/
bright soliton/
dark soliton
