Band structures of strained kagome lattices

doi:10.1088/1674-1056/ad0291

中国物理B ›› 2024, Vol. 33 ›› Issue (2): 27101-027101.doi: 10.1088/1674-1056/ad0291

Band structures of strained kagome lattices

Luting Xu(徐露婷)^1,2 and Fan Yang(杨帆)^1,2,†

1 Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, Tianjin 300354, China;
2 Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, Tianjin University, Tianjin 300354, China

收稿日期:2023-08-19 修回日期:2023-10-08 接受日期:2023-10-12 出版日期:2024-01-16 发布日期:2024-01-25
通讯作者: Fan Yang E-mail:fanyangphys@tju.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11904261 and 11904259).

Band structures of strained kagome lattices

Luting Xu(徐露婷)^1,2 and Fan Yang(杨帆)^1,2,†

1 Center for Joint Quantum Studies and Department of Physics, School of Science, Tianjin University, Tianjin 300354, China;
2 Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Department of Physics, Tianjin University, Tianjin 300354, China

Received:2023-08-19 Revised:2023-10-08 Accepted:2023-10-12 Online:2024-01-16 Published:2024-01-25
Contact: Fan Yang E-mail:fanyangphys@tju.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11904261 and 11904259).

摘要/Abstract

摘要： Materials with kagome lattices have attracted significant research attention due to their nontrivial features in energy bands. We theoretically investigate the evolution of electronic band structures of kagome lattices in response to uniaxial strain using both a tight-binding model and an antidot model based on a periodic muffin-tin potential. It is found that the Dirac points move with applied strain. Furthermore, the flat band of unstrained kagome lattices is found to develop into a highly anisotropic shape under a stretching strain along y direction, forming a partially flat band with a region dispersionless along k_y direction while dispersive along k_x direction. Our results shed light on the possibility of engineering the electronic band structures of kagome materials by mechanical strain.

关键词: kagome lattice, strain, band structure engineering

Abstract: Materials with kagome lattices have attracted significant research attention due to their nontrivial features in energy bands. We theoretically investigate the evolution of electronic band structures of kagome lattices in response to uniaxial strain using both a tight-binding model and an antidot model based on a periodic muffin-tin potential. It is found that the Dirac points move with applied strain. Furthermore, the flat band of unstrained kagome lattices is found to develop into a highly anisotropic shape under a stretching strain along y direction, forming a partially flat band with a region dispersionless along k_y direction while dispersive along k_x direction. Our results shed light on the possibility of engineering the electronic band structures of kagome materials by mechanical strain.

Key words: kagome lattice, strain, band structure engineering

中图分类号: (Electron density of states and band structure of crystalline solids)

71.20.-b

68.65.Cd (Superlattices) 73.21.Cd (Superlattices)

Luting Xu(徐露婷) and Fan Yang(杨帆). Band structures of strained kagome lattices[J]. 中国物理B, 2024, 33(2): 27101-027101.

Luting Xu(徐露婷) and Fan Yang(杨帆). Band structures of strained kagome lattices[J]. Chin. Phys. B, 2024, 33(2): 27101-027101.

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Band structures of strained kagome lattices

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