Higher-order topological insulators and superconductors protected by inversion symmetry
Higher-order topological insulators and superconductors protected by inversion symmetry
Here, higher-order topological insulators and superconductors protected by inversion symmetry are investigated. These phases are characterized by gapped bulk and surface with gapless modes confined to hinges or corners of the sample. Such surface states can be understood as topological defects that are globally stabilized by inversion. They can be …