Searching for topological semi-complete bandgap in elastic truss lattices
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866918061063274496 |
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| author | Hao, Yiran Liu, Dong Luo, Liyou Mu, Jialu Wang, Hanyu Liu, Zibo Li, Jensen Zhu, Zhihong Guo, Qinghua Yang, Biao |
| author_facet | Hao, Yiran Liu, Dong Luo, Liyou Mu, Jialu Wang, Hanyu Liu, Zibo Li, Jensen Zhu, Zhihong Guo, Qinghua Yang, Biao |
| contents | Gapless topological phases have attracted significant interest across both quantum and classical systems owing to their novel physics and promising applications. However, the search for ideal gapless topological nodes inside a clear bandgap is still lacking in elastic systems. The degenerate points are always hidden in the trivial bulk bands due to the intricate elastic modes involved. Here, we find a topological semi-complete bandgap in a three-dimensional elastic truss lattice by tuning a supporting rod, which exhibits a complete bandgap except for the inevitable topological degenerate points. Furthermore, we experimentally map the topological semi-complete bandgap and the inside nontrivial surface state arcs with a scanning laser vibrometer. The introduced scheme provides a systematic approach for the idealization of semi-complete bandgaps and thus may significantly advance the practical utility of topological phases in mechanical engineering domains. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_13601 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Searching for topological semi-complete bandgap in elastic truss lattices Hao, Yiran Liu, Dong Luo, Liyou Mu, Jialu Wang, Hanyu Liu, Zibo Li, Jensen Zhu, Zhihong Guo, Qinghua Yang, Biao Mesoscale and Nanoscale Physics Applied Physics Gapless topological phases have attracted significant interest across both quantum and classical systems owing to their novel physics and promising applications. However, the search for ideal gapless topological nodes inside a clear bandgap is still lacking in elastic systems. The degenerate points are always hidden in the trivial bulk bands due to the intricate elastic modes involved. Here, we find a topological semi-complete bandgap in a three-dimensional elastic truss lattice by tuning a supporting rod, which exhibits a complete bandgap except for the inevitable topological degenerate points. Furthermore, we experimentally map the topological semi-complete bandgap and the inside nontrivial surface state arcs with a scanning laser vibrometer. The introduced scheme provides a systematic approach for the idealization of semi-complete bandgaps and thus may significantly advance the practical utility of topological phases in mechanical engineering domains. |
| title | Searching for topological semi-complete bandgap in elastic truss lattices |
| topic | Mesoscale and Nanoscale Physics Applied Physics |
| url | https://arxiv.org/abs/2506.13601 |