Intrinsic magnetic topological phases in a two-dimensional MnPSe3 monolayer*

The recent observation of ferromagnetic (FM) topological insulators provides a promising platform for understanding the interplay between the band topology and magnetic order. Despite this, intrinsic magnetism of monolayer topological systems has not yet been experimentally realized so far. Here, we study the electronic properties of FM MnPSe3 monolayer to identify its topological nontrivial features with first-principles density-functional-theory (DFT) calculations and a designed tight-binding (TB) model. We demonstrate that magnetic-orientation-dependent different topological states including the quantum anomalous Hall effect (QAHE) and time-reversal symmetry broken quantum spin Hall effect (QSHE) can be obtained in MnPSe3 monolayer, manifesting a promising material realization of topological spintronics in two-dimensional ferromagnet.