Insight into the quantum anomalous Hall states in two-dimensional kagome CrSe and FeS monolayers.

To realize the quantum anomalous Hall (QAH) effect in two-dimensional (2D) intrinsic magnetic materials, which combines insulating bulk states and metallic edge channel states, is still challenging in experiment. Here, based on first-principles calculations, we predicted two stable kagome-latticed QAH insulators: CrSe and FeS monolayers, with the Chern number = 1. It is found that both structures exhibit a large magnetic anisotropy energy and sizable band gaps, and a topological phase transition from = -1 to = 1 occurs when the magnetization orientation changes from the -axis to the --axis.