材料期刊网

All known topological insulators are crystallographically related to either the noncentrosymmetric zinc-blende HgTe-type family or to the hexagonal centrosymmetric Bi(2)Se(3) one. Through first-principles calculations, here we show evidence that under a proper uniaxial strain cubic ternary centrosymmetric antiperovskite compounds (M(3)N)Bi (M = Ca, Sr, and Ba) are three-dimensional topological insulators. This proposed family of materials is chemically inert and the lattice structure is well matched to important semiconductors, which provides a rich platform to easily integrate with electronic devices.