Rotoinversion-symmetric bulk-hinge correspondence and its applications to higher-order Weyl semimetals
Rotoinversion-symmetric bulk-hinge correspondence and its applications to higher-order Weyl semimetals
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DOI：
10.1103/physrevb.105.115119
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发表时间：
2021-11
影响因子：
3.7
通讯作者：
Yutaro Tanaka;R. Takahashi;R. Okugawa;S. Murakami
中科院分区：
文献类型：
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作者：
Yutaro Tanaka;R. Takahashi;R. Okugawa;S. Murakami
我们给出了磁系统中由旋转反转C4I对称性保护的高阶拓扑相的体铰链对应。我们的方法使我们能够显示的手征铰链模式的出现，只有从在布里渊区的高对称点的C4I本征值的信息。此外，基于体铰链对应，我们提出了一类高阶Weyl半金属（HOWSMs）是具有铰链模式和费米弧表面态的Weyl半金属。HOWSM的特征在于三维高阶拓扑绝缘体的拓扑不变量，拓扑不变量由高对称点处的C4I对称特征值决定。这种HOWSM具有手性铰链模式作为在散装的三维高阶拓扑结构的直接后果。
We give a bulk-hinge correspondence for higher-order topological phases protected by rotoinversion C4I symmetry in magnetic systems. Our approach allows us to show the emergence of the chiral hinge modes only from the information of the C4I eigenvalues at the high-symmetry points in the Brillouin zone. In addition, based on the bulk-hinge correspondence, we propose a class of higher-order Weyl semimetals (HOWSMs) being Weyl semimetals with hinge modes and Fermiarc surface states. The HOWSM is characterized by topological invariants for three-dimensional higher-order topological insulators, and the topological invariants are determined by the C4I symmetry eigenvalues at the high-symmetry points. This HOWSM has chiral hinge modes as a direct consequence of the three-dimensional higher-order topology in the bulk.