Phase diagram of a disordered higher-order topological insulator: A machine learning study

被引:74
作者
Araki, Hiromu [1 ]
Mizoguchi, Tomonari [2 ]
Hatsugai, Yasuhiro [1 ,2 ]
机构
[1] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tsukuba, Ibaraki 3058571, Japan
[2] Univ Tsukuba, Dept Phys, Tsukuba, Ibaraki 3058571, Japan
关键词
EDGE STATES; LOCALIZATION;
D O I
10.1103/PhysRevB.99.085406
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A higher-order topological insulator is a new concept of topological states of matter, which is characterized by the emergent boundary states whose dimensionality is lower by more than two compared with that of the bulk, and draws a considerable interest. Yet, its robustness against disorders is still unclear. In this work, we investigate a phase diagram of higher-order topological insulator phases in a breathing kagome model in the presence of disorders by using a state-of-the-art machine learning technique. We find that the corner states survive against the finite strength of disorder potential as long as the energy gap is not closed, indicating the stability of the higher-order topological phases against the disorders.
引用
收藏
页数:8
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