Layer-number parity induced topological phase transition
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2026
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866908846629322752 |
|---|---|
| author | Chen, Kai Guan, Junyan Guo, Jiamin Gao, He Gu, Zhongming Zhu, Jie |
| author_facet | Chen, Kai Guan, Junyan Guo, Jiamin Gao, He Gu, Zhongming Zhu, Jie |
| contents | We demonstrate that stacking topologically trivial layers, under enforced symmetry restrictions, yields emergent topological phases with protected boundary states. Remarkably, the number of layers itself acts as a topological switch, enabling the system to host topological bound states in the continuum (BICs). We analytically show that the spectrum becomes gapless for an odd number of layers; combined with entanglement-spectrum calculations, this confirms that odd-layer systems indeed support topological BICs. We provide experimental confirmation of these phenomena in stacked acoustic lattices. Our findings establish a previously overlooked pathway to topology and demonstrate a readily applicable strategy for realizing exotic states in a wide range of artificial material systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_18855 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Layer-number parity induced topological phase transition Chen, Kai Guan, Junyan Guo, Jiamin Gao, He Gu, Zhongming Zhu, Jie Materials Science We demonstrate that stacking topologically trivial layers, under enforced symmetry restrictions, yields emergent topological phases with protected boundary states. Remarkably, the number of layers itself acts as a topological switch, enabling the system to host topological bound states in the continuum (BICs). We analytically show that the spectrum becomes gapless for an odd number of layers; combined with entanglement-spectrum calculations, this confirms that odd-layer systems indeed support topological BICs. We provide experimental confirmation of these phenomena in stacked acoustic lattices. Our findings establish a previously overlooked pathway to topology and demonstrate a readily applicable strategy for realizing exotic states in a wide range of artificial material systems. |
| title | Layer-number parity induced topological phase transition |
| topic | Materials Science |
| url | https://arxiv.org/abs/2602.18855 |