Electron/infrared-phonon coupling in ABC trilayer graphene

Xiaozhou Zan, Xiangdong Guo, Aolin Deng, Zhiheng Huang, Le Liu, Fanfan Wu, Yalong Yuan, Jiaojiao Zhao, Yalin Peng, Lu Li, Yangkun Zhang, Xiuzhen Li, Jundong Zhu, Jingwei Dong, Dongxia Shi, Wei Yang, Xiaoxia Yang, Zhiwen Shi, Luojun Du (), Qing Dai () and Guangyu Zhang ()
Additional contact information
Xiaozhou Zan: Chinese Academy of Sciences
Xiangdong Guo: National Center for Nanoscience and Technology
Aolin Deng: Shanghai Jiao Tong University
Zhiheng Huang: Chinese Academy of Sciences
Le Liu: Chinese Academy of Sciences
Fanfan Wu: Chinese Academy of Sciences
Yalong Yuan: Chinese Academy of Sciences
Jiaojiao Zhao: Chinese Academy of Sciences
Yalin Peng: Chinese Academy of Sciences
Lu Li: Chinese Academy of Sciences
Yangkun Zhang: Chinese Academy of Sciences
Xiuzhen Li: Chinese Academy of Sciences
Jundong Zhu: Chinese Academy of Sciences
Jingwei Dong: Chinese Academy of Sciences
Dongxia Shi: Chinese Academy of Sciences
Wei Yang: Chinese Academy of Sciences
Xiaoxia Yang: National Center for Nanoscience and Technology
Zhiwen Shi: Shanghai Jiao Tong University
Luojun Du: Chinese Academy of Sciences
Qing Dai: National Center for Nanoscience and Technology
Guangyu Zhang: Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-6

Abstract: Abstract Stacking order plays a crucial role in determining the crystal symmetry and has significant impacts on electronic, optical, magnetic, and topological properties. Electron-phonon coupling, which is central to a wide range of intriguing quantum phenomena, is expected to be intricately connected with stacking order. Understanding the stacking order-dependent electron-phonon coupling is essential for understanding peculiar physical phenomena associated with electron-phonon coupling, such as superconductivity and charge density waves. In this study, we investigate the effect of stacking order on electron-infrared phonon coupling in graphene trilayers. By using gate-tunable Raman spectroscopy and excitation frequency-dependent near-field infrared nanoscopy, we show that rhombohedral ABC-stacked trilayer graphene has a significant electron-infrared phonon coupling strength. Our findings provide novel insights into the superconductivity and other fundamental physical properties of rhombohedral ABC-stacked trilayer graphene, and can enable nondestructive and high-throughput imaging of trilayer graphene stacking order using Raman scattering.

Date: 2024
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DOI: 10.1038/s41467-024-46129-7

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