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- W4289445541 abstract "Notion of square-root topological insulators have been recently generalized to higher-order topological insulators. In two-dimensional square-root higher-order topological insulators, emergence of in-gap corner states are inherited from the squared Hamiltonian which hosts higher-order topology. In this paper, we propose that the martini lattice model serves as a concrete example of higher-order topological insulators. Furthermore, we also propose a suquare-root higher-order topological insulator based on the martini model. Specifically, we propose that the honeycomb lattice model with two-site decoration, whose squared Hamiltonian consists of two martini lattice models, realizes square-root higher-order topological insulators. We show, for both of these two models, that in-gap corner states appear at finite energies and that they are portected by non-trivial bulk $mathbb{Z}_3$ topological invariant." @default.
- W4289445541 created "2022-08-02" @default.
- W4289445541 creator A5004099770 @default.
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- W4289445541 date "2022-07-29" @default.
- W4289445541 modified "2023-10-16" @default.
- W4289445541 title "Higher-Order Topological Insulator on a Martini Lattice and Its Square Root Descendant" @default.
- W4289445541 doi "https://doi.org/10.48550/arxiv.2207.14540" @default.
- W4289445541 hasPublicationYear "2022" @default.
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