The ${\mathbf{Z}}_2$ topological invariants in 2D and 3D topological superconductors without time reversal symmetry

Jinpeng Xiao, Qianglin Hu, Huiqiong Zeng +1

In theory of topological classification, the 2D topological superconductors without time reversal symmetry are characterized by Chern numbers. However, in reality, we find the Cher…