Disorder induced phase transition in magnetic higher-order topological insulator: A machine learning study Project supported by the National Natural Science Foundation of China (Grant No. 11822407) and the Priority Academic Program Development of Jiangsu Higher Education Institutions, China. |
Chern number projection obtained by noncommutative geometry. The horizontal axis is the magnetic field intensity B and the vertical axis is the disordered intensity W. Here, we take the absolute value of the Chern number. Because whether the Chern number takes positive or negative value, the system is a Chern insulator. |