Artificial kagome lattices of Shockley surface states patterned by halogen hydrogen-bonded organic frameworks

Ruoting Yin, Xiang Zhu, Qiang Fu, Tianyi Hu, Lingyun Wan, Yingying Wu, Yifan Liang, Zhengya Wang, Zhen-Lin Qiu, Yuan-Zhi Tan, Chuanxu Ma (), Shijing Tan, Wei Hu, Bin Li, Z. F. Wang, Jinlong Yang and Bing Wang ()
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Ruoting Yin: University of Science and Technology of China
Xiang Zhu: University of Science and Technology of China
Qiang Fu: University of Science and Technology of China
Tianyi Hu: University of Science and Technology of China
Lingyun Wan: University of Science and Technology of China
Yingying Wu: University of Science and Technology of China
Yifan Liang: University of Science and Technology of China
Zhengya Wang: University of Science and Technology of China
Zhen-Lin Qiu: Xiamen University
Yuan-Zhi Tan: Xiamen University
Chuanxu Ma: University of Science and Technology of China
Shijing Tan: University of Science and Technology of China
Wei Hu: University of Science and Technology of China
Bin Li: University of Science and Technology of China
Z. F. Wang: University of Science and Technology of China
Jinlong Yang: University of Science and Technology of China
Bing Wang: University of Science and Technology of China

Nature Communications, 2024, vol. 15, issue 1, 1-11

Abstract: Abstract Artificial electronic kagome lattices may emerge from electronic potential landscapes using customized structures with exotic supersymmetries, benefiting from the confinement of Shockley surface-state electrons on coinage metals, which offers a flexible approach to realizing intriguing quantum phases of matter that are highly desired but scarce in available kagome materials. Here, we devise a general strategy to construct varieties of electronic kagome lattices by utilizing the on-surface synthesis of halogen hydrogen-bonded organic frameworks (XHOFs). As a proof of concept, we demonstrate three XHOFs on Ag(111) and Au(111) surfaces, which correspondingly deliver regular, breathing, and chiral breathing diatomic-kagome lattices with patterned potential landscapes, showing evident topological edge states at the interfaces. The combination of scanning tunnelling microscopy and noncontact atomic force microscopy, complemented by density functional theory and tight-binding calculations, directly substantiates our method as a reliable and effective way to achieve electronic kagome lattices for engineering quantum states.

Date: 2024
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DOI: 10.1038/s41467-024-47367-5

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