Hidden Moiré Topology of Low-Symmetry Weyl Surfaces
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866915658534486016 |
|---|---|
| author | Li, Cong Yang, Zhilong Liu, Hongxiong Berntsen, Magnus H. Scali, Francesco Phuyal, Dibya Zhang, Jianfeng Kim, Timur K. Osiecki, Jacek Thiagarajan, Balasubramanian Shi, Youguo Xiang, Tao Wu, Quansheng Tjernberg, Oscar |
| author_facet | Li, Cong Yang, Zhilong Liu, Hongxiong Berntsen, Magnus H. Scali, Francesco Phuyal, Dibya Zhang, Jianfeng Kim, Timur K. Osiecki, Jacek Thiagarajan, Balasubramanian Shi, Youguo Xiang, Tao Wu, Quansheng Tjernberg, Oscar |
| contents | Topological materials are defined by the correspondence between bulk topology and boundary states, yet this correspondence becomes enigmatic on low-symmetry surfaces where bulk and surface periodicities are inherently mismatched. Here we reveal a hidden moiré topology emerging on the (103) surface of the Weyl semimetal NdAlSi. Angle-resolved photoemission spectroscopy uncovers closed Fermi-arc loops and momentum-space moiré modulations, phenomena unanticipated in conventional topological theory. We show that these emerge from incomplete bulk projection and multi-cell interference governed by a least-common-multiple framework. Least-common-multiple guided DFT and Green's-function calculations quantitatively reproduce the observed spectra, establishing the universality of this commensuration rule. These findings transform a long-standing paradox of bulk-boundary correspondence into a new paradigm of momentum-space moiré reconstruction, bridging crystalline and quasicrystalline topologies and opening routes to flat-band engineering on complex surfaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_10106 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hidden Moiré Topology of Low-Symmetry Weyl Surfaces Li, Cong Yang, Zhilong Liu, Hongxiong Berntsen, Magnus H. Scali, Francesco Phuyal, Dibya Zhang, Jianfeng Kim, Timur K. Osiecki, Jacek Thiagarajan, Balasubramanian Shi, Youguo Xiang, Tao Wu, Quansheng Tjernberg, Oscar Materials Science Other Condensed Matter Strongly Correlated Electrons Topological materials are defined by the correspondence between bulk topology and boundary states, yet this correspondence becomes enigmatic on low-symmetry surfaces where bulk and surface periodicities are inherently mismatched. Here we reveal a hidden moiré topology emerging on the (103) surface of the Weyl semimetal NdAlSi. Angle-resolved photoemission spectroscopy uncovers closed Fermi-arc loops and momentum-space moiré modulations, phenomena unanticipated in conventional topological theory. We show that these emerge from incomplete bulk projection and multi-cell interference governed by a least-common-multiple framework. Least-common-multiple guided DFT and Green's-function calculations quantitatively reproduce the observed spectra, establishing the universality of this commensuration rule. These findings transform a long-standing paradox of bulk-boundary correspondence into a new paradigm of momentum-space moiré reconstruction, bridging crystalline and quasicrystalline topologies and opening routes to flat-band engineering on complex surfaces. |
| title | Hidden Moiré Topology of Low-Symmetry Weyl Surfaces |
| topic | Materials Science Other Condensed Matter Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2509.10106 |