Global band topology of simple and double Dirac-point semimetals
Global band topology of simple and double Dirac-point semimetals
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DOI：
10.1103/physrevb.95.241101
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发表时间：
2017-06-05
影响因子：
3.7
通讯作者：
Black-Schaffer, Annica M.
中科院分区：
文献类型：
--
作者：
Bouhon, Adrien;Black-Schaffer, Annica M.
我们结合联合收割机空间群表示理论与扫描的封闭子域的布里渊区威尔逊环代数确定的全球带结构拓扑结构。以空间群No.19为例，我们证明了在高对称点{Gamma，S，T，U}的不可约表示的能量序完全决定了整体能带拓扑，所有拓扑类都通过它们的单Dirac点和双Dirac点来表征.
We combine space group representation theory together with the scanning of closed subdomains of the Brillouin zone with Wilson loops to algebraically determine the global band-structure topology. Considering space group No. 19 as a case study, we show that the energy ordering of the irreducible representations at the high-symmetry points {Gamma, S, T, U} fully determines the global band topology, with all topological classes characterized through their simple and double Dirac points.