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説明:

We investigate higher-order topological states in honeycomb lattice with Y-Kekulé distortions that preserve C6v 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 Z6 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.

権利情報:

• In Copyright
  

  ©2024 The Physical Society of Japan

キーワード: honeycomb lattice, higher-order topology, band structure, tight-binding model

刊行年月日: 2024-03-15

出版者: Physical Society of Japan

掲載誌:

• Journal of the Physical Society of Japan (ISSN: 00319015) vol. 93 issue. 3 033703

研究助成金:

• JST JPMJCR18T4 (CREST)

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4791

公開URL: https://doi.org/10.7566/jpsj.93.033703

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更新時刻: 2024-10-02 16:30:15 +0900

MDRでの公開時刻: 2024-10-02 16:30:17 +0900