Realization of quantum anomalous Hall effect in graphene from n−p codoping-induced stable atomic adsorption

Using first-principles calculation methods, we study the possibility of realizing a quantum anomalous Hall effect in graphene from stable $3d$ atomic adsorption via a charge-compensated $n\ensuremath{-}p$ codoping scheme. As concrete examples, we show that long-range ferromagnetism can be established by codoping $3d$ transition metal and boron atoms, but only the Ni codopants can open up a global bulk gap to harbor the quantum anomalous Hall effect. Our estimated ferromagnetic Curie transition temperature can reach over 10 K for various codoping concentrations.