Realization of Material with an Atomic Ruby Lattice

The ruby lattice is one of the tight-binding models which hosts a flat band in its electronic structure and has potential applications in future spintronics and quantum devices. However, the experimental realization of a ruby lattice in realistic materials remains elusive. Here, we have experimentally realized an atomic ruby lattice by fabricating monolayer CuCl<sub>1+<i>x</i></sub> on a Au(111) substrate. Scanning tunneling microscopy/spectra (STM/STS) measurements combined with density-functional theory (DFT) calculations reveal that the Cu atoms are arranged in a ruby lattice in this monolayer. Moreover, a significant density of states (DOS) peak corresponding to the characteristic of a ruby system is observed, consistent with both the tight-binding model and first-principles calculations on the band structure. Our work provides a promising platform to explore the physics of the ruby model.

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Publication Details

Journal
Nano Letters
Published
2024-08-23
DOI
https://doi.org/10.1021/acs.nanolett.4c03236
Citations
4
Primary Topic
Topological Materials and Phenomena
Type
article
Field-Weighted Citation Impact
1.35

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article

Realization of Material with an Atomic Ruby Lattice

Yunhao Lu, Xiaoyue He, Zhihao Cai, Baojie Feng et al.
4 citations
Nano Letters
Topological Materials and Phenomena
1.35
article

Realization of Material with an Atomic Ruby Lattice

Yunhao Lu, Xiaoyue He, Zhihao Cai, Baojie Feng, Kehui Wu, Huiru Liu, Zijia Liu, Shengdan Tao, Lan Chen, Chen Ma, Dacheng Tian, Panyin Li, Yu He
article en
4 citations

Abstract

The ruby lattice is one of the tight-binding models which hosts a flat band in its electronic structure and has potential applications in future spintronics and quantum devices. However, the experimental realization of a ruby lattice in realistic materials remains elusive. Here, we have experimentally realized an atomic ruby lattice by fabricating monolayer CuCl<sub>1+<i>x</i></sub> on a Au(111) substrate. Scanning tunneling microscopy/spectra (STM/STS) measurements combined with density-functional theory (DFT) calculations reveal that the Cu atoms are arranged in a ruby lattice in this monolayer. Moreover, a significant density of states (DOS) peak corresponding to the characteristic of a ruby system is observed, consistent with both the tight-binding model and first-principles calculations on the band structure. Our work provides a promising platform to explore the physics of the ruby model.

Nano LettersVol. 24(35)
Shaoxing University (CN), Peking University (CN), Songshan Lake Materials Laboratory (CN), Institute of Physics (CN), University of Chinese Academy of Sciences (CN), Zhejiang University (CN)
National Natural Science Foundation of China, National Key Research and Development Program of China
Sustainable cities and communities
Openalex Percentile: Top 20%
Topological Materials and Phenomena
1.35
DOISourceOpenAlex
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