2017
DOI: 10.1103/physrevb.96.165441
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Regularities of the quantum spin Hall phase formation in three-dimensional tetradymite-like topological insulator thin films

Abstract: We present first-principles calculations of electronic structure and topological properties of thin films of tetradymite-like binary, ternary, and quaternary compounds. Two-dimensional topological insulators were found, including two septuple layer films of PbBi 2 Te 4 with large band gap. We demonstrate that the Pb-based thin films inherit Z 2 dependence on the film thickness from the "parent" quintuple-layer compounds. An effective way to induce the topological phase transition in the trivial thin films is p… Show more

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