论文标题
二维范德华磁铁CRI3中的拓扑磁化
Topological magnonics in the two-dimensional van der Waals magnet CrI3
论文作者
论文摘要
在本文中，我们计算了Kitaev-Heisenberg Magnets的镁谱。该模型最近被提议为旋转哈密顿量，以模拟$ \ text {cri} _3 $和其他二维磁铁。这是一种最小的自旋哈密顿量，其中包括因赫森伯格，各向同性交换以及kitaev互动，各向异性和沮丧的交流而产生的贡献。我们的计算揭示了镁的拓扑性质和一个差距，该差距以$ k $和$ k^\ prime $点开放。这些拓扑特性会产生诸如热厅效应之类的效果。除了散装特性之外，我们还计算了纳米骨本的磁通光谱，以说明相应的边缘状态。
In this article, we calculate the magnon spectrum of Kitaev-Heisenberg magnets. This model has been recently proposed as a spin Hamiltonian to model $\text{CrI}_3$ and other two-dimensional magnets. It is a minimal spin Hamiltonian that includes a contribution stemming from a Heisenberg, isotropic exchange, and a contribution arising from a Kitaev interaction, anisotropic and frustrated exchange. Our calculations reveal the topological nature of the magnons and a gap that opens at the $K$ and $K^\prime$ points. These topological properties give rise to effects such as thermal Hall effect. In addition to the bulk properties, we calculate the magnon spectrum of nanoribbons illustrating the corresponding edge states.
