Higher-order topology in honeycomb lattice with Y-Kekulé distortions
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866911783568015360 |
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| author | Jiang, Yong-Cheng Kariyado, Toshikaze Hu, Xiao |
| author_facet | Jiang, Yong-Cheng Kariyado, Toshikaze Hu, Xiao |
| contents | We investigate higher-order topological states in honeycomb lattice with Y-Kekulé distortions that preserve $C_{6v}$ crystalline symmetry. The gapped states in expanded and shrunken distortions are adiabatically connected to isolated hexamers and Y-shaped tetramer states, respectively, where the former possesses nontrivial higher-order topology characterized by a $\mathbb{Z}_6$ invariant. Topological corner states exist in a flake structure with expanded distortion where the hexamers are broken at the corners. Our work reveals that honeycomb lattice with Y-Kekulé distortions serves as a promising platform to study higher-order topological states. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_17713 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Higher-order topology in honeycomb lattice with Y-Kekulé distortions Jiang, Yong-Cheng Kariyado, Toshikaze Hu, Xiao Mesoscale and Nanoscale Physics Materials Science We investigate higher-order topological states in honeycomb lattice with Y-Kekulé distortions that preserve $C_{6v}$ crystalline symmetry. The gapped states in expanded and shrunken distortions are adiabatically connected to isolated hexamers and Y-shaped tetramer states, respectively, where the former possesses nontrivial higher-order topology characterized by a $\mathbb{Z}_6$ invariant. Topological corner states exist in a flake structure with expanded distortion where the hexamers are broken at the corners. Our work reveals that honeycomb lattice with Y-Kekulé distortions serves as a promising platform to study higher-order topological states. |
| title | Higher-order topology in honeycomb lattice with Y-Kekulé distortions |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2401.17713 |