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arXiv · 2407.08353

1D flat bands in phosphorene nanoribbons with pentagonal nature

Shuo Sun·Jing-Yang You·Zhihao Cai·Jie Su·Tong Yang·Xinnan Peng·Yihe Wang·Daiyu Geng·Jian Gou·Yuli Huang·Sisheng Duan·Lan Chen·Kehui Wu·Andrew T. S. Wee·Yuan Ping Feng·Jia Lin Zhang·Jiong Lu·Baojie Feng·Wei Chen
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Abstract

Materials with flat bands can serve as a promising platform to investigate strongly interacting phenomena. However, experimental realization of ideal flat bands is mostly limited to artificial lattices or moir\'e systems. Here we report a general way to construct one-dimensional (1D) flat bands in phosphorene nanoribbons (PNRs) with pentagonal nature: penta-hexa-PNRs and penta-dodeca-PNRs, wherein the corresponding 1D flat bands are directly verified by using angle-resolved photoemission spectroscopy. We confirm that the observed 1D flat bands originate from the electronic 1D zigzag and Lieb lattices, respectively, as revealed by the combination of bond-resolved scanning tunneling microscopy, scanning tunneling spectroscopy, tight-binding models, and first-principles calculations. Our study demonstrates a general way to construct 1D flat bands in 1D solid materials system, which provides a robust platform to explore strongly interacting phases of matter.

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Shuo Sun, Jing-Yang You, Zhihao Cai, Jie Su, Tong Yang, Xinnan Peng, Yihe Wang, Daiyu Geng, Jian Gou, Yuli Huang, Sisheng Duan, Lan Chen, Kehui Wu, Andrew T. S. Wee, Yuan Ping Feng, Jia Lin Zhang, Jiong Lu, Baojie Feng, Wei Chen. 2024-07-11. 1D flat bands in phosphorene nanoribbons with pentagonal nature. https://doi.org/10.1002/adma.202411182

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