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Special Issue:
SPECIAL TOPIC — Moiré physics in two-dimensional materials
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| SPECIAL TOPIC — Moiré physics in two-dimensional materials |
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Semiregular tessellation of electronic lattices in untwisted bilayer graphene under anisotropic strain gradients |
| Zeyu Liu(刘泽宇)1,2,3,†, Xianghua Kong(孔祥华)1,†,‡, Zhidan Li(李志聃)1, Zewen Wu(吴泽文)1, Linwei Zhou(周霖蔚)1, Cong Wang(王聪)2,3, and Wei Ji(季威)2,3,§ |
1 College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China;
2 Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices, School of Physics, Renmin University of China, Beijing 100872, China;
3 Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education), Renmin University of China, Beijing 100872, China |
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Abstract Two-dimensional (2D) moiré superlattices have emerged as a versatile platform for uncovering exotic quantum phases, many of which arise in bilayer systems exhibiting Archimedean tessellation patterns such as triangular, hexagonal, and kagome lattices. Here, we propose a strategy to engineer semiregular tessellation patterns in untwisted bilayer graphene by applying anisotropic epitaxial tensile strain (AETS) along crystallographic directions. Through force-field and first-principles calculations, we demonstrate that AETS can induce a rich variety of semiregular tessellation geometries, including truncated hextille, prismatic pentagon, and brick-phase arrangements. Characteristic electronic Dirac and flat bands of the lattice models associated with these semiregular tessellations are observed near the Fermi level, arising from interlayer interactions generated by the spatial rearrangement of AB, BA, and SP domains. Furthermore, the real-space observations of electronic kagome, distorted Lieb, brick-like, and one-dimensional stripe lattices demonstrate that AETS enables tunable semiregular tessellation lattices. Our study identifies AETS as a promising new degree of freedom in moiré engineering, offering a reproducible and scalable platform for exploring exotic electronic lattices in moiré systems.
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Received: 12 May 2025
Revised: 24 July 2025
Accepted manuscript online: 14 August 2025
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PACS:
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73.22.-f
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(Electronic structure of nanoscale materials and related systems)
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81.05.ue
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(Graphene)
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68.65.-k
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(Low-dimensional, mesoscopic, nanoscale and other related systems: structure and nonelectronic properties)
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68.65.Cd
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(Superlattices)
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| Fund: We thank Dr. Kui Gong, Dr. Yibin Hu, and Dr. Yin Wang (all from HZWTECH) and Prof. Yiqi Zhang for helpful discussions. This project was supported by the National Natural Science Foundation of China (Grant Nos. 52461160327, 92477205, 12474173, and 12104313), the National Key R&D Program of China (Grant No. 2023YFA1406500), the Department of Science and Technology of Guangdong Province (Grant No. 2021QN02L820), Shenzhen Science and Technology Program (Grant No. RCYX20231211090126026, the Stable Support Plan Program 20220810161616001), the Fundamental Research Funds for the Central Universities, and the Research Funds of Renmin University of China (Grant No. 22XNKJ30). |
Corresponding Authors:
Xianghua Kong, Wei Ji
E-mail: kongxianghuaphysics@szu.edu.cn;wji@ruc.edu.cn
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Cite this article:
Zeyu Liu(刘泽宇), Xianghua Kong(孔祥华), Zhidan Li(李志聃), Zewen Wu(吴泽文), Linwei Zhou(周霖蔚), Cong Wang(王聪), and Wei Ji(季威) Semiregular tessellation of electronic lattices in untwisted bilayer graphene under anisotropic strain gradients 2025 Chin. Phys. B 34 097309
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