Stable two-dimensional dumbbell stanene: A quantum spin Hall insulator
Stable two-dimensional dumbbell stanene: A quantum spin Hall insulator
From density functional theory within the generalized gradient approximation we predict a structure of stanene with dumbbell units (DBs), and show that it is a two-dimensional topological insulator with an inverted band gap which can be tuned by compressive strain. Furthermore, we propose that the boron nitride sheet and reconstructed …