Spatial topological insulator
Abstract
Traditional topological insulators often rely on band inversions driven by nonuniform hopping textures and spin-orbit coupling, as exemplified in the Su-Schrieffer-Heeger and Kane-Mele models. We present a novel approach utilizing the spatial nature of sublattice symmetry to induce nontrivial topological insulating properties characterized by second-order corner states without band inversion. To substantiate our proposal, we design a photonic crystal with non primitive translational symmetry, demonstrating unique directional waveguide edge modes and localized corner modes.
- Publication:
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arXiv e-prints
- Pub Date:
- May 2024
- DOI:
- 10.48550/arXiv.2405.14165
- arXiv:
- arXiv:2405.14165
- Bibcode:
- 2024arXiv240514165H
- Keywords:
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- Condensed Matter - Superconductivity
- E-Print:
- 3 pages, 3 figures