论文标题
二阶拓扑绝缘子的铰链状态，作为马赫特尔干涉仪
Hinge States of Second-Order Topological Insulators as a Mach-Zehnder Interferometer
论文作者
论文摘要
三维高阶拓扑绝缘子可以在其铰链上传播拓扑的手性模式。具有两个共同传播手性模式的铰链可以用作仅单手模式的铰链之间的“光束分离器”。在这里，我们展示了这种晶体如何将其铰链连接到其铰链上，以实现马赫德尔干涉仪。我们介绍了磁场中一阶拓扑绝缘子的晶格模型的具体计算，该模型适合参数是一种外部二阶拓扑绝缘子，具有手性铰链模式所需的配置。
Three-dimensional higher-order topological insulators can have topologically protected chiral modes propagating on their hinges. Hinges with two co-propagating chiral modes can serve as a "beam splitter" between hinges with only a single chiral mode. Here we show how such a crystal, with Ohmic contacts attached to its hinges, can be used to realize a Mach-Zehnder interferometer. We present concrete calculations for a lattice model of a first-order topological insulator in a magnetic field, which, for a suitable choice of parameters, is an extrinsic second-order topological insulator with the required configuration of chiral hinge modes.
