论文标题
具有滑行反射对称性的高阶拓扑绝缘子
Higher-order topological insulator with glide reflection symmetry
论文作者
论文摘要
Benalcazar-Bernevig-Hughes（BBH）模型是最具代表性的高阶拓扑绝缘子之一，比较了常规拓扑状态，具有不同的体积边缘对应关系。在这项工作中，我们建议通过耦合两个拓扑不同的BBH模型来实现具有滑动反射对称性的几对BBH模型。这样的系统产生了传统BBH模型以外的引人入胜的属性。在该系统中预测了从高阶拓扑阶段到半学的拓扑相变。此外，还探索了通过滑行反射对称性保护的频带交叉点和节点环。我们的工作提供了一个观点，可以证明由高阶拓扑与非晶格对称性之间的相互作用引起的多功能现象。
The Benalcazar-Bernevig-Hughes(BBH) model is one of the most representative higher-order topological insulators with different bulk-edge correspondence comparing conventional topological states. In this work, we propose to realize a couple-BBH model with glide reflection symmetry by coupling two topologically distinct BBH models. Such a system gives rise to intriguing properties beyond the traditional BBH model. A topological phase transition from higher-order topological phase to a semimetal has been predicted in this system. Furthermore, the band crossing points and nodal ring protected by glide reflection symmetry has also been explored. Our work provides a viewpoint to demonstrate the versatile phenomena induced by the interplay between higher-order topology and nonsymmorphic symmetries.
