https://doi.org/10.1140/epjp/s13360-023-04695-7
Regular Article
Topological phase transitions in a honeycomb ferromagnet with unequal Dzyaloshinskii-Moriya interactions
Department of Physics, Jishou University, 416000, Jishou, China
Received:
21
June
2023
Accepted:
15
November
2023
Published online:
27
November
2023
This theoretical research is devoted to studying topological phase transitions in a two-dimensional honeycomb ferromagnetic lattice with unequal Dzyaloshinskii-Moriya interactions for the two sublattices. With the help of a first-order Green’s function formalism, we analyze the influence of magnon-magnon interaction on the magnon band topology. It is found that the existence of the antichiral Dzyaloshinskii-Moriya interaction can led to a tilting of the renormalized magnon bands near the Dirac momenta. Then, the renormalized magnon band gaps at Dirac points have different widths. Through changing the temperature, we can observe the renormalized magnon band gap closing-reopening phenomenon, which corresponds to the topological phase transition. Our results show that the critical temperature of the topological phase transition is linked to the strength of the antichiral Dzyaloshinskii-Moriya interaction.
Heng Zhu and Hongchao Shi these authors contributed equally to this work.
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