论文标题
带有共线的扭曲双层磁铁中的MoiréMagnons
Moiré magnons in twisted bilayer magnets with collinear order
论文作者
论文摘要
假设在弱层间偶联下保留了较低的平面线性磁性顺序，我们将在扭曲的双层磁体中探索Moiré少量带。通过计算四个代表性案例的宏伟带结构和拓扑结构和拓扑结构，我们发现（i）山谷Moiré带在各种连续的扭曲角度上非常平坦； （ii）最低的几个平面带的拓扑成分随扭角的差异很大； （iii）双层抗铁磁体中的最低拓扑平坦带需要在横向方向上进行非平凡的热自旋传输；这些特性使扭曲的双层磁铁成为研究Moiré电子镁质对应物的理想平台，在该平台上，镁和电子之间的统计区别从根本上带来了新的身体行为。
We explore the moiré magnon bands in twisted bilayer magnets with next-nearest neighboring Dzyaloshinskii-Moriya interactions, assuming that the out-of-plane collinear magnetic order is preserved under weak interlayer coupling. By calculating the magnonic band structures and the topological Chern numbers for four representative cases, we find that (i) the valley moiré bands are extremely flat over a wide range of continuous twist angles; (ii) the topological Chern numbers of the lowest few flat bands vary significantly with the twist angle; and (iii) the lowest few topological flat bands in bilayer antiferromagnets entail nontrivial thermal spin transport in the transverse direction; These properties make twisted bilayer magnets an ideal platform to study the magnonic counterparts of moiré electrons, where the statistical distinction between magnons and electrons leads to fundamentally new physical behavior.
