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- W2798492787 abstract "We theoretically show that IV--VI semiconducting compounds with low-temperature rhombohedral crystal structure represent a new potential platform for topological semimetals. By means of minimal $mathbf{k}ifmmodecdotelsetextperiodcenteredfi{}mathbf{p}$ models, we find that the two-step structural symmetry reduction of the high-temperature rocksalt crystal structure, comprising a rhombohedral distortion along the [111] direction followed by a relative shift of the cation and anion sublattices, gives rise to topologically protected Weyl semimetal and nodal line semimetal phases. We derive general expressions for the nodal features and apply our results to SnTe, showing explicitly how Weyl points and nodal lines emerge in this system. Experimentally, the topological semimetals could potentially be realized in the low-temperature ferroelectric phase of SnTe, GeTe, and related alloys." @default.
- W2798492787 created "2018-05-07" @default.
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- W2798492787 date "2019-05-07" @default.
- W2798492787 modified "2023-10-10" @default.
- W2798492787 title "Topological Semimetals in the SnTe Material Class: Nodal Lines and Weyl Points" @default.
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- W2798492787 doi "https://doi.org/10.1103/physrevlett.122.186801" @default.
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