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- W2937337708 abstract "Current understanding of higher-order topological insulators (HOTIs) is based primarily on crystalline materials. Here, we propose that HOTIs can be realized in quasicrystals. Specifically, we show that two distinct types of second-order topological insulators (SOTIs) can be constructed on the quasicrystalline lattices (QLs) with different tiling patterns. One is derived by using a Wilson mass term to gap out the edge states of the quantum spin Hall insulator on QLs. The other is the quasicrystalline quadrupole insulator (QI) with a quantized quadrupole moment. We reveal some unusual features of the corner states (CSs) in the quasicrystalline SOTIs. We also show that the quasicrystalline QI can be simulated by a designed electrical circuit, where the CSs can be identified by measuring the impedance resonance peak. Our findings not only extend the concept of HOTIs into quasicrystals but also provide a feasible way to detect the topological property of quasicrystals in experiments." @default.
- W2937337708 created "2019-04-25" @default.
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- W2937337708 date "2020-01-22" @default.
- W2937337708 modified "2023-10-18" @default.
- W2937337708 title "Higher-Order Topological Insulators in Quasicrystals" @default.
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- W2937337708 doi "https://doi.org/10.1103/physrevlett.124.036803" @default.
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- W2937337708 hasPublicationYear "2020" @default.
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