| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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ARPES study of Y2O2Bi single crystals: Intrinsic electronic structure of Bi square nets |
| Yun-Bo Wu(吴云波)1,†, Tong-Rui Li(李彤瑞)1,†, Zhi-Peng Cao(曹志鹏)2, Zhan-Feng Liu(刘站锋)1, Yu-Liang Li(李昱良)1, Zheng-Ming Shang(尚政明)1, Xin Zheng(郑新)1, Hui Tian(田慧)1, Zong-Yi Wang(王宗一)1, Yu-Tong Bi(毕雨桐)1, Hao-Yang Zhou(周浩洋)1, Yi Liu(刘毅)1, Guo-Bin Zhang(张国斌)1, Zheng-Tai Liu(刘正太)3,4, Da-Wei Shen(沈大伟)1, Li-Dong Zhang(张李东)1, Sheng-Tao Cui(崔胜涛)1,‡, and Zhe Sun(孙喆)1,5,6,7,§ |
1 National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China;
2 Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, China;
3 Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China;
4 National Key Laboratory of Materials for Integrated Circuits, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
5 Department of Physics, CAS Key Laboratory of Strongly-coupled Quantum Matter Physics, University of Science and Technology of China, Hefei 230026, China;
6 Zhejiang Institute of Photoelectronics, Jinhua 321004, China;
7 Collaborative Innovation Center of Advanced Microstructures, Nanjing 210093, China |
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Abstract The Bi square net, a structural motif in a diverse array of layered compounds, has emerged as a desirable system for investigating the interplay between strong spin—orbit coupling, reduced dimensionality, and magnetism. We present a comprehensive study of Y2O2Bi single crystals using high-resolution angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT) calculations to elucidate the intrinsic electronic structure of the Bi square net. Our findings reveal a pronounced two-dimensional character of the electronic states, with the Bi square net dominating the low-energy electronic structure. While Y2O2Bi itself exhibits no topological features, DFT calculations on related Bi square net compounds reveal that the surrounding crystal environment can induce non-trivial topology, as exemplified by the topological insulator LiBi. This comparative study establishes a crucial benchmark for understanding Bi square net physics and informs the design of future Bi square net-based quantum materials.
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Received: 31 July 2025
Revised: 28 August 2025
Accepted manuscript online: 09 September 2025
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PACS:
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71.20.-b
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(Electron density of states and band structure of crystalline solids)
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71.70.Ej
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(Spin-orbit coupling, Zeeman and Stark splitting, Jahn-Teller effect)
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73.20.At
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(Surface states, band structure, electron density of states)
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74.25.Jb
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(Electronic structure (photoemission, etc.))
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| Fund: This project was supported by the National Natural Science Foundation of China (Grant No. U2032153), the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant No. XDB25000000), the Innovation Program for Quantum Science and Technology (Grant No. 2021ZD0302802), the Users with Excellence Program of Hefei Science Center of the Chinese Academy of Sciences (Grant No. 2021HSC-UE004), and the Fundamental Research Funds for the Central Universities (Grant No. WK2310000104). Numerical computations were performed at the Hefei Advanced Computing Center. |
Corresponding Authors:
Sheng-Tao Cui, Zhe Sun
E-mail: shengtaocui@ustc.edu.cn;zsun@ustc.edu.cn
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Cite this article:
Yun-Bo Wu(吴云波), Tong-Rui Li(李彤瑞), Zhi-Peng Cao(曹志鹏), Zhan-Feng Liu(刘站锋), Yu-Liang Li(李昱良), Zheng-Ming Shang(尚政明), Xin Zheng(郑新), Hui Tian(田慧), Zong-Yi Wang(王宗一), Yu-Tong Bi(毕雨桐), Hao-Yang Zhou(周浩洋), Yi Liu(刘毅), Guo-Bin Zhang(张国斌), Zheng-Tai Liu(刘正太), Da-Wei Shen(沈大伟), Li-Dong Zhang(张李东), Sheng-Tao Cui(崔胜涛), and Zhe Sun(孙喆) ARPES study of Y2O2Bi single crystals: Intrinsic electronic structure of Bi square nets 2026 Chin. Phys. B 35 047101
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