论文标题
识别和构建复杂的磁杆拓扑
Identifying, and constructing, complex magnon band topology
论文作者
论文摘要
磁性有序的材料倾向于支持连贯的传播自旋波或镁激发的带。受拓扑保护的镁质表面状态为Spintronics应用提供了一条新的途径。在这项工作中，我们探讨了多种拓扑镁带结构，并提供了有关如何有效识别材料中拓扑镁带的洞察力。我们通过调整拓扑量子化学方法来做到这一点，该方法使用了时间逆转和晶体对称性施加的约束来枚举大型拓扑电子带。我们展示了如何通过使用所谓的可分解基本带表示来识别与物理相关的模型，并讨论了如何使用对称数据来推断出异国情调的对称性强制性淋巴结拓扑的存在。
Magnetically ordered materials tend to support bands of coherent propagating spin wave, or magnon, excitations. Topologically protected surface states of magnons offer a new path towards coherent spin transport for spintronics applications. In this work we explore the variety of topological magnon band structures and provide insight into how to efficiently identify topological magnon bands in materials. We do this by adapting the topological quantum chemistry approach that has used constraints imposed by time reversal and crystalline symmetries to enumerate a large class of topological electronic bands. We show how to identify physically relevant models of gapped magnon band topology by using so-called decomposable elementary band representations, and in turn discuss how to use symmetry data to infer the presence of exotic symmetry enforced nodal topology.
