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arXiv · 2003.14268

Nonlinear localized excitations in a topological ferromagnetic honeycomb lattice

Wenhui Feng·Bing Tang·Lanjun Wu·Peng Kong·Chao Yang·Lei Wang·Ke Deng
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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.

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Wenhui Feng, Bing Tang, Lanjun Wu, Peng Kong, Chao Yang, Lei Wang, Ke Deng. 2020-03-31. Nonlinear localized excitations in a topological ferromagnetic honeycomb lattice. https://doi.org/10.1016/j.jmmm.2021.168089

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