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arXiv 2007.13781cond-mat.mes-hallcond-mat.str-el
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旋转对称拓扑绝缘体和超导体中向错处的体-边界-缺陷对应

Bulk-boundary-defect correspondence at disclinations in rotation-symmetric topological insulators and superconductors

Max Geier, Ion Cosma Fulga, Alexander Lau

摘要:

我们研究了基态拓扑结构和拓扑结构之间的联系,晶格通过存在异常状态的向错-拓扑晶格缺陷,违反旋转对称性只在本地。我们首先显示存在的异常向错状态,如马约拉纳零模式或螺旋电子状态,在二阶拓扑相位通过Volterra过程。利用拓扑晶体的框架,构造了具有旋转和平移对称性的$d$维晶体拓扑相,然后确定了弱拓扑相和一阶拓扑相对$(d-2)$维反常向错态的所有贡献.我们执行此程序的所有Cartan对称类的拓扑绝缘体和超导体在二维和三维,并确定是否散装拓扑结构,边界签名和向错异常之间的对应关系是唯一的。

英文摘要:

We study a link between the ground-state topology and the topology of the lattice via the presence of anomalous states at disclinations -- topological lattice defects that violate a rotation symmetry only locally. We first show the existence of anomalous disclination states, such as Majorana zero-modes or helical electronic states, in second-order topological phases by means of Volterra processes. Using the framework of topological crystals to construct $d$-dimensional crystalline topological phases with rotation and translation symmetry, we then identify all contributions to $(d-2)$-dimensional anomalous disclination states from weak and first-order topological phases. We perform this procedure for all Cartan symmetry classes of topological insulators and superconductors in two and three dimensions and determine whether the correspondence between bulk topology, boundary signatures, and disclination anomaly is unique.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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