Universal Role of Combined Symmetry for the Protection of the Dirac Cone
in Antiferromagnetic Topological Insulators
Universal Role of Combined Symmetry for the Protection of the Dirac Cone
in Antiferromagnetic Topological Insulators
Antiferromagnetic topological insulators (AF TIs) are predicted to exhibit exotic physical properties such as gigantic optical and topological magnetoelectric responses. While a key to achieving such phenomena relies on how to break the symmetry protecting the Dirac-cone surface state (SS) and acquire the mass of Dirac fermions, the mechanism has …