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- W2023488056 abstract "It is desirable to realize topological phases in artificial structures by engineering electronic band structures. In this paper, we investigate $(PbTe)_m(SnTe)_{2n-m}$ superlattices along [001] direction and find a robust weak topological insulator phase for a large variety of layer numbers m and 2n-m. We confirm this topologically non-trivial phase by calculating Z2 topological invariants and topological surface states based on the first-principles calculations. We show that the folding of Brillouin zone due to the superlattice structure plays an essential role in inducing topologically non-trivial phases in this system. This mechanism can be generalized to other systems in which band inversion occurs at multiple momenta, and gives us a brand-new way to engineer topological materials in artificial structures." @default.
- W2023488056 created "2016-06-24" @default.
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- W2023488056 date "2014-02-24" @default.
- W2023488056 modified "2023-10-10" @default.
- W2023488056 title "Weak topological insulators in PbTe/SnTe superlattices" @default.
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- W2023488056 doi "https://doi.org/10.1103/physrevb.89.085312" @default.
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