Open AccessBound Soliton–Defect Spin States in Anisotropic Ferromagnetic Chains
Author(s) -
R. S. Kamburova,
M. T. Primatarowa
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1762/1/012020
Subject(s) - semiclassical physics , physics , soliton , ferromagnetism , spin (aerodynamics) , condensed matter physics , anisotropy , nonlinear system , quantum mechanics , quantum , thermodynamics
The interaction of soliton with an impurity spin in a discrete anisotropic ferromagnetic chain is studied. The defect spin in our model is characterized by modification of the exchange interaction with its neighbors. A perturbed nonlinear Schrödinger (NLS) equation for the spin amplitude is derived on the basis of a semiclassical and a continuum approximation. A specific feature of this type of defect is that it leads to perturbations to all terms of the NLS equation. Localized soliton-defect spin solutions are obtained for the case of dark and bright solitons and their stability is analyzed.