Realization of Material with an Atomic Ruby Lattice.

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

NANO LETTERS（2024）

Chinese Acad Sci

Cited 0|Views8

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 CuCl1+x 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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Key words

Ruby lattice,flat-band,two-dimensional materials,scanning tunneling microscopy

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