论文标题
多层镁绝缘子的拓扑特性
Topological properties of multilayer magnon insulators
论文作者
论文摘要
二维磁绝缘子可以成为拓扑镁的有前途的宿主。在这项研究中，我们表明ABC堆积的蜂窝状晶格多层具有交替的Dzyaloshinskii-Moriya相互作用（DMI）揭示了丰富的拓扑磁化相图。基于我们的带结构和浆果曲率计算，我们证明了热霍尔行为的跳跃，这些跳跃与通过调整DMI和Interlayer耦合触发的拓扑相变为证实。我们将通用多层的相位图连接到双层和三层系统。我们在多层的多层中发现了一个均匀的效果，在该效果中，均匀的层在热门电导率中没有跳跃，但是奇数层确实如此。我们还观察到三层层中存在拓扑接近效应。我们的结果为操纵Chern数字及其在拓扑宏伟的系统中的可测量效果提供了新方案。
Two-dimensional magnetic insulators can be promising hosts for topological magnons. In this study, we show that ABC-stacked honeycomb lattice multilayers with alternating Dzyaloshinskii-Moriya interaction (DMI) reveal a rich topological magnon phase diagram. Based on our bandstructure and Berry curvature calculations, we demonstrate jumps in the thermal Hall behavior that corroborate with topological phase transitions triggered by adjusting the DMI and interlayer coupling. We connect the phase diagram of generic multilayers to a bilayer and a trilayer system. We find an even-odd effect amongst the multilayers where the even layers show no jump in thermal Hall conductivity, but the odd layers do. We also observe the presence of topological proximity effect in our trilayer. Our results offer new schemes to manipulate Chern numbers and their measurable effects in topological magnonic systems.
