Observation of topological Faraday and Kerr rotations in quantum anomalous Hall state by terahertz magneto-optics

K. N. Okada, Y. Takahashi, M. Mogi +6

Electrodynamic responses from three-dimensional (3D) topological insulators (TIs) are characterized by the universal magnetoelectric $E\cdot B$ term constituent of the Lagrangian f…