Surface band-selective moiré effect induces flat band in mixed-dimensional heterostructures
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866908583963131904 |
|---|---|
| author | Yu, Shuming Fu, Zhentao Qin, Dingkun Li, Enting Zhong, Hao Wang, Xingzhe Zhao, Keming Mo, Shangkun Wan, Qiang Li, Yiwei Li, Jie Zhong, Jianxin Ding, Hong Xu, Nan |
| author_facet | Yu, Shuming Fu, Zhentao Qin, Dingkun Li, Enting Zhong, Hao Wang, Xingzhe Zhao, Keming Mo, Shangkun Wan, Qiang Li, Yiwei Li, Jie Zhong, Jianxin Ding, Hong Xu, Nan |
| contents | In this work, we reveal a curious type of moiré effect that selectively modifies the surface states of bulk crystal. We synthesize mixed-dimensional heterostructures consisting of a noble gas monolayer grow on the surface of bulk Bi(111), and determine the electronic structure of the heterostructures using angle-resolved photoemission spectroscopy. We directly observe moiré replicas of the Bi(111) surface states, while the bulk states remain barely changed. Meanwhile, we achieve control over the moiré period in the range of 25 Å to 80 Å by selecting monolayers of different noble gases and adjusting the annealing temperature. At large moiré periods, we observe hybridization between the surface band replicas, which leads to the formation of a correlated flat band. Our results serve as a bridge for understanding the moiré modulation effect from 2D to 3D systems, and provide a feasible approach for the realization of correlated phenomena through the engineering of surface states via moiré effects. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_07704 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Surface band-selective moiré effect induces flat band in mixed-dimensional heterostructures Yu, Shuming Fu, Zhentao Qin, Dingkun Li, Enting Zhong, Hao Wang, Xingzhe Zhao, Keming Mo, Shangkun Wan, Qiang Li, Yiwei Li, Jie Zhong, Jianxin Ding, Hong Xu, Nan Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science In this work, we reveal a curious type of moiré effect that selectively modifies the surface states of bulk crystal. We synthesize mixed-dimensional heterostructures consisting of a noble gas monolayer grow on the surface of bulk Bi(111), and determine the electronic structure of the heterostructures using angle-resolved photoemission spectroscopy. We directly observe moiré replicas of the Bi(111) surface states, while the bulk states remain barely changed. Meanwhile, we achieve control over the moiré period in the range of 25 Å to 80 Å by selecting monolayers of different noble gases and adjusting the annealing temperature. At large moiré periods, we observe hybridization between the surface band replicas, which leads to the formation of a correlated flat band. Our results serve as a bridge for understanding the moiré modulation effect from 2D to 3D systems, and provide a feasible approach for the realization of correlated phenomena through the engineering of surface states via moiré effects. |
| title | Surface band-selective moiré effect induces flat band in mixed-dimensional heterostructures |
| topic | Strongly Correlated Electrons Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2510.07704 |