Nonlinear localized excitations in a topological ferromagnetic honeycomb lattice
arXiv:2003.14268 · doi:10.1016/j.jmmm.2021.168089
Abstract
We theoretically investigate nonlinear localized excitations in a Heisenberg honeycomb ferromagnet with a second neighbour Dzialozinskii-Moriya interaction, which has been proved to possess the topological band structure. Using the time-dependent variational principle, we obtain the equation of motion for the system in the Glauber coherent-state representation. By means of the semidiscrete multiple-scale method, different types of nonlinear localized excitations are gotten.Our results show that both two-dimensional discrete breathers and bulk gap solitons may occur in the Heisenberg honeycomb ferromagnet.
arXiv commentThis paper has been published in Journal of Magnetism and Magnetic Materials
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