Stacking-dependent topological electronic structures in honeycomb-kagome heterolayers
Abstract Heterostructures of stacked two-dimensional lattices have shown great promise for engineering novel material properties. As an archetypal example of such a system, the hexagon-shared honeycomb-kagome lattice has been experimentally synthesized in various material platforms. In this work, we...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2025-07-01
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| Series: | npj 2D Materials and Applications |
| Online Access: | https://doi.org/10.1038/s41699-025-00582-0 |
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| author | Chan Bin Bark Hanbyul Kim Seik Pak Hong-Guk Min Sungkyun Ahn Youngkuk Kim Moon Jip Park |
| author_facet | Chan Bin Bark Hanbyul Kim Seik Pak Hong-Guk Min Sungkyun Ahn Youngkuk Kim Moon Jip Park |
| author_sort | Chan Bin Bark |
| collection | DOAJ |
| description | Abstract Heterostructures of stacked two-dimensional lattices have shown great promise for engineering novel material properties. As an archetypal example of such a system, the hexagon-shared honeycomb-kagome lattice has been experimentally synthesized in various material platforms. In this work, we explore three rotationally symmetric variants of the honeycomb-kagome lattice: the hexagonal, triagonal, and biaxial phases. While the triagonal and biaxial phases exhibit trivial insulating and Dirac semimetal band structures, respectively, the hexagonal phase hosts a higher-order topological phase driven by band inversion near the Γ-point. This highlights a key distinction from the conventional band inversions at the K-point observed in hexagonal homobilayer systems. Furthermore, we demonstrate how the distinct topological properties of these phases result in network band structures within moiré heterostructures formed by twisted or lattice-mismatched HK systems. These network band structures can be experimentally observed through extrinsic twisting or intrinsic lattice mismatch between the honeycomb and kagome systems. |
| format | Article |
| id | doaj-art-79559f0d84d34f09a5542911f3d82cc9 |
| institution | Kabale University |
| issn | 2397-7132 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj 2D Materials and Applications |
| spelling | doaj-art-79559f0d84d34f09a5542911f3d82cc92025-08-20T03:45:30ZengNature Portfolionpj 2D Materials and Applications2397-71322025-07-01911810.1038/s41699-025-00582-0Stacking-dependent topological electronic structures in honeycomb-kagome heterolayersChan Bin Bark0Hanbyul Kim1Seik Pak2Hong-Guk Min3Sungkyun Ahn4Youngkuk Kim5Moon Jip Park6Department of Physics, Hanyang UniversityDepartment of Physics, Hanyang UniversityDepartment of Physics, Hanyang UniversityDepartment of Physics, Sungkyunkwan UniversityDepartment of Physics, Sungkyunkwan UniversityDepartment of Physics, Sungkyunkwan UniversityDepartment of Physics, Hanyang UniversityAbstract Heterostructures of stacked two-dimensional lattices have shown great promise for engineering novel material properties. As an archetypal example of such a system, the hexagon-shared honeycomb-kagome lattice has been experimentally synthesized in various material platforms. In this work, we explore three rotationally symmetric variants of the honeycomb-kagome lattice: the hexagonal, triagonal, and biaxial phases. While the triagonal and biaxial phases exhibit trivial insulating and Dirac semimetal band structures, respectively, the hexagonal phase hosts a higher-order topological phase driven by band inversion near the Γ-point. This highlights a key distinction from the conventional band inversions at the K-point observed in hexagonal homobilayer systems. Furthermore, we demonstrate how the distinct topological properties of these phases result in network band structures within moiré heterostructures formed by twisted or lattice-mismatched HK systems. These network band structures can be experimentally observed through extrinsic twisting or intrinsic lattice mismatch between the honeycomb and kagome systems.https://doi.org/10.1038/s41699-025-00582-0 |
| spellingShingle | Chan Bin Bark Hanbyul Kim Seik Pak Hong-Guk Min Sungkyun Ahn Youngkuk Kim Moon Jip Park Stacking-dependent topological electronic structures in honeycomb-kagome heterolayers npj 2D Materials and Applications |
| title | Stacking-dependent topological electronic structures in honeycomb-kagome heterolayers |
| title_full | Stacking-dependent topological electronic structures in honeycomb-kagome heterolayers |
| title_fullStr | Stacking-dependent topological electronic structures in honeycomb-kagome heterolayers |
| title_full_unstemmed | Stacking-dependent topological electronic structures in honeycomb-kagome heterolayers |
| title_short | Stacking-dependent topological electronic structures in honeycomb-kagome heterolayers |
| title_sort | stacking dependent topological electronic structures in honeycomb kagome heterolayers |
| url | https://doi.org/10.1038/s41699-025-00582-0 |
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