论文标题
各向异性dzyaloshinskii-moriya的相互作用和拓扑磁性在受P4-M2晶体对称性保护的二维磁体中
Anisotropic Dzyaloshinskii-Moriya interaction and topological magnetism in two-dimensional magnets protected by P4-m2 crystal symmetry
论文作者
论文摘要
作为基本磁参数，dzyaloshinskii-moriya相互作用（DMI）在过去二十年中引起了很多关注，因为它在形成磁性天空中的关键作用。由于有吸引力的物理特性（例如栅极可调性，灵活性和小型化），最近发现二维（2D）范德华（VDW）磁铁的发现也引起了很多关注。强化研究表明，各向同性DMI稳定2D磁铁或其相应异质结构中的铁磁（FM）拓扑旋转纹理。然而，对各向异性DMI和抗铁磁（AFM）拓扑结构的研究仍然难以捉摸。在这里，我们提出并证明了一个具有P4-M2对称性保护的各向异性DMI的2D磁铁家族。更有趣的是，该家族中出现了各种拓扑旋转构型，包括FM/AFM Antiskyrmion和AFM涡流 - 抗体对。这些结果提供了一种通用方法，可以使用晶体对称性在2D材料中铺平拓扑磁性的道路。
As a fundamental magnetic parameter, Dzyaloshinskii-Moriya interaction (DMI), has gained a great deal of attention in the last two decades due to its critical role in formation of magnetic skyrmions. Recent discoveries of two-dimensional (2D) van der Waals (vdW) magnets has also gained a great deal of attention due to appealing physical properties, such as gate tunability, flexibility and miniaturization. Intensive studies have shown that isotropic DMI stabilizes ferromagnetic (FM) topological spin textures in 2D magnets or their corresponding heterostructures. However, the investigation of anisotropic DMI and antiferromagnetic (AFM) topological spin configurations remains elusive. Here, we propose and demonstrate that a family of 2D magnets with P4-m2 symmetry-protected anisotropic DMI. More interestingly, various topological spin configurations, including FM/AFM antiskyrmion and AFM vortex-antivortex pair, emerge in this family. These results give a general method to design anisotropic DMI and pave the way towards topological magnetism in 2D materials using crystal symmetry.
