首页|Interacting topological magnons in a checkerboard ferromagnet

Interacting topological magnons in a checkerboard ferromagnet

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This work is devoted to studying the magnon-magnon interaction effect in a two-dimensional checkerboard ferro-magnet with the Dzyaloshinskii-Moriya interaction.Using a first-order Green function method,we analyze the influence of magnon-magnon interaction on the magnon band topology.We find that Chern numbers of two renormalized magnon bands are different above and below the critical temperature,which means that the magnon band gap-closing phenomenon is an indicator for one topological phase transition of the checkerboard ferromagnet.Our results show that the checkerboard ferromagnet possesses two topological phases,and its topological phase can be controlled either via the temperature or the applied magnetic field due to magnon-magnon interactions.Interestingly,it is found that the topological phase transition can occur twice with the increase in the temperature,which is different from the results of the honeycomb ferromagnet.

topological magnonsmagnon-magnon interactionstopological phase transitionscheckerboard ferromagnets

朱恒、施洪潮、唐政国、唐炳

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Department of Physics,Jishou University,Jishou 416000,China

国家自然科学基金Natural Science Fund Project of Hunan ProvinceGraduate Research Innovation Foundation of Jishou University

120640112020JJ4498Jdy21030

2024

10.1088/1674-1056/ad01a2

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(3)
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