Weak topological insulators induced by the inter-layer coupling: A first-principles study of stacked Bi2TeI

Peizhe Tang, Binghai Yan, Wendong Cao +3

Based on first-principles calculations, we predict Bi2TeI, a stoichiometric compound synthesized, to be a weak topological insulator (TI) in layered subvalent bismuth telluroiodide…