中国物理B ›› 2024, Vol. 33 ›› Issue (7): 77403-077403.doi: 10.1088/1674-1056/ad4cdc

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Moiré superlattices arising from growth induced by screw dislocations in layered materials

Fuyu Tian(田伏钰)1, Muhammad Faizan1, Xin He(贺欣)1, Yuanhui Sun(孙远慧)2,†, and Lijun Zhang(张立军)1,‡   

  1. 1 State Key Laboratory of Integrated Optoelectronics Key Laboratory of Automobile Materials of MOE and College of Materials Science and Engineering, Jilin University, Changchun 130012, China;
    2 Suzhou Laboratory, Suzhou 215123, China
  • 收稿日期:2024-04-26 修回日期:2024-05-16 接受日期:2024-05-17 出版日期:2024-06-18 发布日期:2024-06-28
  • 通讯作者: Yuanhui Sun, Lijun Zhang E-mail:sunyh@szlab.ac.cn;lijun_zhang@jlu.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2022YFA1402500) and the National Natural Science Foundation of China (Grant No. 62125402).

Moiré superlattices arising from growth induced by screw dislocations in layered materials

Fuyu Tian(田伏钰)1, Muhammad Faizan1, Xin He(贺欣)1, Yuanhui Sun(孙远慧)2,†, and Lijun Zhang(张立军)1,‡   

  1. 1 State Key Laboratory of Integrated Optoelectronics Key Laboratory of Automobile Materials of MOE and College of Materials Science and Engineering, Jilin University, Changchun 130012, China;
    2 Suzhou Laboratory, Suzhou 215123, China
  • Received:2024-04-26 Revised:2024-05-16 Accepted:2024-05-17 Online:2024-06-18 Published:2024-06-28
  • Contact: Yuanhui Sun, Lijun Zhang E-mail:sunyh@szlab.ac.cn;lijun_zhang@jlu.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2022YFA1402500) and the National Natural Science Foundation of China (Grant No. 62125402).

摘要: Moiré superlattices (MSLs) are modulated structures produced from homogeneous or heterogeneous two-dimensional layers stacked with a twist angle and/or lattice mismatch. Enriching the methods for fabricating MSL and realizing the unique emergent properties are key challenges in its investigation. Here we recommend that the spiral dislocation driven growth is another optional method for the preparation of high quality MSL samples. The spiral structure stabilizes the constant out-of-plane lattice distance, causing the variations in electronic and optical properties. Taking SnS$_{2}$ MSL as an example, we find prominent properties including large band gap reduction ($\sim 0.4 $ eV) and enhanced optical activity. First-principles calculations reveal that these unusual properties can be ascribed to the locally enhanced interlayer interaction associated with the Moiré potential modulation. We believe that the spiral dislocation driven growth would be a powerful method to expand the MSL family and broaden their scope of application.

关键词: Moiré superlattices, interlayer interaction, spiral dislocation, layered materials

Abstract: Moiré superlattices (MSLs) are modulated structures produced from homogeneous or heterogeneous two-dimensional layers stacked with a twist angle and/or lattice mismatch. Enriching the methods for fabricating MSL and realizing the unique emergent properties are key challenges in its investigation. Here we recommend that the spiral dislocation driven growth is another optional method for the preparation of high quality MSL samples. The spiral structure stabilizes the constant out-of-plane lattice distance, causing the variations in electronic and optical properties. Taking SnS$_{2}$ MSL as an example, we find prominent properties including large band gap reduction ($\sim 0.4 $ eV) and enhanced optical activity. First-principles calculations reveal that these unusual properties can be ascribed to the locally enhanced interlayer interaction associated with the Moiré potential modulation. We believe that the spiral dislocation driven growth would be a powerful method to expand the MSL family and broaden their scope of application.

Key words: Moiré superlattices, interlayer interaction, spiral dislocation, layered materials

中图分类号:  (Multilayers, superlattices, heterostructures)

  • 74.78.Fk
68.65.Cd (Superlattices) 31.15.es (Applications of density-functional theory (e.g., to electronic structure and stability; defect formation; dielectric properties, susceptibilities; viscoelastic coefficients; Rydberg transition frequencies)) 81.10.-h (Methods of crystal growth; physics and chemistry of crystal growth, crystal morphology, and orientation)