High-Throughput Investigations of Topological and Nodal Superconductors.
High-Throughput Investigations of Topological and Nodal Superconductors.
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DOI：
10.1103/physrevlett.129.027001
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发表时间：
2021-06
影响因子：
8.6
通讯作者：
F. Tang;Seishiro Ono;X. Wan;Haruki Watanabe
中科院分区：
文献类型：
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作者：
F. Tang;Seishiro Ono;X. Wan;Haruki Watanabe
对称性指示剂理论使数据库搜索正常导电阶段的拓扑材料成为可能，这导致了几个百科全书式的拓扑材料数据库。到目前为止，由于缺乏关于现实材料的配对对称性的信息，这样的拓扑超导体数据库还没有实现。在这封信中，我们回避了这个问题，我们解决了另一个问题：对于每个点群的单值表示，对材料中的拓扑和节点超导电性的预测。基于最近发展的超导体对称性指标，我们提供了从配对对称性到非磁性材料的拓扑或节点超导性质的全面映射，这些材料列在无机晶体结构数据库中。我们定量地表明，当假设属于一维非平凡的点群表示的配对时，大约90%的计算材料是拓扑或节点超导体。当材料是表象强制的节点超导体时，节点的位置和形状也被识别出来。结合实验，我们的结果将有助于我们理解配对机制，并促进长期寻找的有望用于拓扑量子计算的Majorana费米子的实现。
The theory of symmetry indicators has enabled database searches for topological materials in normal conducting phases, which has led to several encyclopedic topological material databases. To date, such a database for topological superconductors is yet to be achieved because of the lack of information about pairing symmetries of realistic materials. In this Letter, sidestepping this issue, we tackle an alternative problem: the predictions of topological and nodal superconductivity in materials for each single-valued representation of point groups. Based on recently developed symmetry indicators for superconductors, we provide comprehensive mappings from pairing symmetries to the topological or nodal superconducting nature for nonmagnetic materials listed in the Inorganic Crystal Structure Database. We quantitatively show that around 90% of computed materials are topological or nodal superconductors when a pairing that belongs to a one-dimensional nontrivial representation of point groups is assumed. When materials are representation-enforced nodal superconductors, positions and shapes of the nodes are also identified. When combined with experiments, our results will help us understand the pairing mechanism and facilitate realizations of the long-sought Majorana fermions promising for topological quantum computations.