Optical solitons and modulation instability analysis of an integrable model of (2+1)-Dimensional Heisenberg ferromagnetic spin chain equation

• Published in: Superlattices and microstructures Vol. 112; pp. 628 - 638
• Main Authors: Inc, Mustafa, Aliyu, Aliyu Isa, Yusuf, Abdullahi, Baleanu, Dumitru
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2017
• Subjects: Complex envelope function ansatz; Generalized tanh method; HFSC; Modulation instability; Complex envelope function ansatz; Generalized tanh method; Modulation instability; HFSC
• ISSN: 0749-6036; 1096-3677
• DOI: 10.1016/j.spmi.2017.10.018

This paper addresses the nonlinear Schrödinger type equation (NLSE) in (2+1)-dimensions which describes the nonlinear spin dynamics of Heisenberg ferromagnetic spin chains (HFSC) with anisotropic and bilinear interactions in the semiclassical limit. Two integration schemes are employed to study the equation. These are the complex envelope function ansatz and the generalized tanh methods. Dark, dark-bright or combined optical and singular soliton solutions of the equation are derived. Furthermore, the modulational instability (MI) is studied based on the standard linear-stability analysis and the MI gain is got. Numerical simulation of the obtained results are analyzed with interesting figures showing the physical meaning of the solutions. •The non-linear Shrödinger type equation in (2+1)-dimensions is studied.•The complex envelope function ansatz and the generalized tanh methods are used.•The modulational instability is analyzed based on the standard linear-stability analysis.