arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2007.10398cond-mat.mtrl-scicond-mat.mes-hall
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扭曲范德华磁体中的堆叠畴壁磁振子

Stacking Domain Wall Magnons in Twisted van der Waals Magnets

Chong Wang, Yuan Gao, Hongyan Lv, Xiaodong Xu, Di Xiao

摘要:

以双层CrI $_3$为例,我们证明了范德华磁体中的堆叠畴壁可以容纳一维(1D)磁振子通道,其具有比体磁振子低的能量。有趣的是,一些磁振子通道隐藏在磁均匀背景中,只能用堆叠畴壁的知识来推断。与限制在磁畴壁中的一维磁振子相比,堆叠畴壁中的一维磁振子对外界扰动的稳定性更好。我们发现,小角度扭曲双层CrI $_3$的弛豫莫尔超晶格是堆叠畴壁和宿主互连莫尔磁振子网络的自然实现。我们的工作揭示了堆叠畴壁在理解范德华磁体磁性方面的重要性,并将堆叠工程的范围扩展到磁动力学。

英文摘要:

Using bilayer CrI$_3$ as an example, we demonstrate that stacking domain walls in van der Waals magnets can host one dimensional (1D) magnon channels, which have lower energies than bulk magnons. Interestingly, some magnon channels are hidden in magnetically homogeneous background and can only be inferred with the knowledge of stacking domain walls. Compared to 1D magnons confined in magnetic domain walls, 1D magnons in stacking domain walls are more stable against external perturbations. We show that the relaxed moiré superlattices of small-angle twisted bilayer CrI$_3$ is a natural realization of stacking domain walls and host interconnected moiré magnon network. Our work reveals the importance of stacking domain walls in understanding magnetic properties of van der Waals magnets, and extends the scope of stacking engineering to magnetic dynamics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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