Functionalized Germanene as a Prototype of Large-Gap Two-Dimensional Topological Insulators

Chen Si, Junwei Liu, Yong Xu +3

We propose new two-dimensional (2D) topological insulators (TIs) in functionalized germanenes (GeX, X=H, F, Cl, Br or I) using first-principles calculations. We find GeI is a 2D TI…