论文标题
磁性多层中可调的宏伟的Chern带和手性旋转电流
Tunable Magnonic Chern Bands and Chiral Spin Currents in Magnetic Multilayers
论文作者
论文摘要
宏伟带结构中新型拓扑阶段的实现代表了开发具有低功耗的Spintronics和Magnonics的新机会。在这项工作中，我们表明，在对齐的磁性多层对齐的磁性多层中，远程，手性偶极相互作用会产生具有非零的Chern整数和带有手性旋转电流的宏伟表面状态的散装带。表面状态是严格局部的，可以通过外部磁场轻松地在非平底和琐碎相之间切换。在这种偶极耦合异质结构中，手性表面旋转电流的实现代表了耦合线模型的宏伟实现，该实现已在电子系统中广泛探索。我们的工作提出了一个易于实现的系统，用于以可调的方式实现拓扑宏伟的表面状态和低衰减自旋电流传输。
Realization of novel topological phases in magnonic band structures represents a new opportunity for the development of spintronics and magnonics with low power consumption. In this work, we show that in antiparallelly aligned magnetic multilayers, the long-range, chiral dipolar interaction generates bulk bands with non-zero Chern integers and magnonic surface states carrying chiral spin currents. The surface states are strictly localized and can be easily toggled between non-trivial and trivial phases through an external magnetic field. The realization of chiral surface spin currents in this dipolarly coupled heterostructure represents a magnonic implementation of the coupled wire model that has been extensively explored in electronic systems. Our work presents an easy-to-implement system for realizing topological magnonic surface states and low-dissipation spin current transport in a tunable manner.
