Bond-resolved silicene on Au(111) substrate

doi:10.1088/1674-1056/adee02

中国物理B ›› 2025, Vol. 34 ›› Issue (9): 96801-096801.doi: 10.1088/1674-1056/adee02

Bond-resolved silicene on Au(111) substrate

Ye Chen(陈烨)¹, Wenya Zhai(翟文雅)¹, Haoyuan Zang(臧浩原)¹, Zengfu Ou(欧增福)², Donghui Guo(郭东辉)^1,†, and Jingcheng Li(李竟成)^1,‡

1 Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-sen University, Guangzhou 510275, China;
2 College of Physics and Electronic Information Engineering, Guilin University of Technology, Guilin 541004, China

收稿日期:2025-05-02 修回日期:2025-06-28 接受日期:2025-07-10 出版日期:2025-08-21 发布日期:2025-09-17
通讯作者: Donghui Guo, Jingcheng Li E-mail:guodonghui@mail.sysu.edu.cn;lijch73@mail.sysu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 12474181), the Guangdong Basic and Applied Basic Research Foundation (Grant Nos. 2021B0301030002 and 2024A1515010656), and the Guangdong Science and Technology Project (Grant No. 2021QN02X859). The experiments reported were conducted at the Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices (Grant No. 2022B1212010008).

Bond-resolved silicene on Au(111) substrate

Ye Chen(陈烨)¹, Wenya Zhai(翟文雅)¹, Haoyuan Zang(臧浩原)¹, Zengfu Ou(欧增福)², Donghui Guo(郭东辉)^1,†, and Jingcheng Li(李竟成)^1,‡

1 Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices, School of Physics, Sun Yat-sen University, Guangzhou 510275, China;
2 College of Physics and Electronic Information Engineering, Guilin University of Technology, Guilin 541004, China

Received:2025-05-02 Revised:2025-06-28 Accepted:2025-07-10 Online:2025-08-21 Published:2025-09-17
Contact: Donghui Guo, Jingcheng Li E-mail:guodonghui@mail.sysu.edu.cn;lijch73@mail.sysu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 12474181), the Guangdong Basic and Applied Basic Research Foundation (Grant Nos. 2021B0301030002 and 2024A1515010656), and the Guangdong Science and Technology Project (Grant No. 2021QN02X859). The experiments reported were conducted at the Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices (Grant No. 2022B1212010008).

1. 2025-096801-SI.pdf(1061KB)

摘要/Abstract

摘要： Silicene, a silicon analog of graphene, holds promise for next-generation electronics due to its tunable bandgap and larger spin-orbit coupling. Despite extensive efforts to synthesize and characterize silicene on metal substrates, bond-resolved imaging of its atomic structure has remained elusive. Here, we report the fabrication and bond-resolved characterization of silicene on Au(111) substrate. Three silicene phases tuned by surface reconstruction and annealing temperatures are achieved. Using CO-terminated scanning tunneling microscopy (STM) tips, we resolve these silicene phases with atomic precision, determining their bond lengths, local strain, and geometric configurations. Furthermore, we correlate these structural features with their electronic properties, revealing the effect of strain and substrate interactions on the electronic properties of silicene. This work establishes silicene's intrinsic bonding topology and resolves longstanding controversies in silicene research.

关键词: scanning tunneling microscope, synthesis of silicene on Au(111), bond resolved imaging, bond length, local strain

Abstract: Silicene, a silicon analog of graphene, holds promise for next-generation electronics due to its tunable bandgap and larger spin-orbit coupling. Despite extensive efforts to synthesize and characterize silicene on metal substrates, bond-resolved imaging of its atomic structure has remained elusive. Here, we report the fabrication and bond-resolved characterization of silicene on Au(111) substrate. Three silicene phases tuned by surface reconstruction and annealing temperatures are achieved. Using CO-terminated scanning tunneling microscopy (STM) tips, we resolve these silicene phases with atomic precision, determining their bond lengths, local strain, and geometric configurations. Furthermore, we correlate these structural features with their electronic properties, revealing the effect of strain and substrate interactions on the electronic properties of silicene. This work establishes silicene's intrinsic bonding topology and resolves longstanding controversies in silicene research.

Key words: scanning tunneling microscope, synthesis of silicene on Au(111), bond resolved imaging, bond length, local strain

中图分类号: (Scanning tunneling microscopy (including chemistry induced with STM))

68.37.Ef

82.75.Fq (Synthesis, structure determination, structure modeling) 61.46.-w (Structure of nanoscale materials) 81.07.-b (Nanoscale materials and structures: fabrication and characterization)

Ye Chen(陈烨), Wenya Zhai(翟文雅), Haoyuan Zang(臧浩原), Zengfu Ou(欧增福), Donghui Guo(郭东辉), and Jingcheng Li(李竟成). Bond-resolved silicene on Au(111) substrate[J]. 中国物理B, 2025, 34(9): 96801-096801.

Ye Chen(陈烨), Wenya Zhai(翟文雅), Haoyuan Zang(臧浩原), Zengfu Ou(欧增福), Donghui Guo(郭东辉), and Jingcheng Li(李竟成). Bond-resolved silicene on Au(111) substrate[J]. Chin. Phys. B, 2025, 34(9): 96801-096801.

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Bond-resolved silicene on Au(111) substrate

Bond-resolved silicene on Au(111) substrate

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