Minimal models for Wannier-type higher-order topological insulators and phosphorene
Minimal models for Wannier-type higher-order topological insulators and phosphorene
A higher-order topological insulator (HOTI) is an extended notion of the conventional topological insulator. It belongs to a special class of topological insulators to which the conventional bulk-boundary correspondence is not applicable. Provided the mirror symmetries are present, the bulk topological number is described by the quantized Wannier center located …