Electronic structure evolution in magnetic topological materials

The discovery of topological insulators (TIs) has prompted intensive theoretical and experimental studies on realizing various topological states in quantum materials. Owing to the bulk-boundary correspondence, the TIs support conducting surface states that lie within the gapped bulk electronic spectrum of the TIs. These surface states are spin polarized and disperse linearly with Dirac-cone energy dispersion. Constraints of the time-reversal symmetry protect the surface states from backscattering and localization in the presence of nonmagnetic perturbations thereby making TIs promising for low-power energy-efficient quantum electronic applications. Recently, new types of topological materials inspired by magnetism have attracted intensive research interest. In this talk, I will discuss electronic structure evolution across the magnetic transition temperature for (1) a higher order topological material candidate, (2) rare-earth monopnictide based materials, (3) a magnetically doped topological material and (4) kagome magnets.  Our study indicates that magnetism plays an intricate role in the electronic structure of the topological material family.