Electron-infrared phonon coupling in ABC trilayer graphene

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 s...

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Bibliographic Details
Published in:arXiv.org 2023-04
Main Authors: Zan, Xiaozhou, Guo, Xiangdong, Deng, Aolin, Huang, Zhiheng, Liu, Le, Wu, Fanfan, Yuan, Yalong, Zhao, Jiaojiao, Peng, Yalin, Lu, Li, Zhang, Yangkun, Li, Xiuzhen, Zhu, Jundong, Dong, Jingwei, Shi, Dongxia, Yang, Wei, Yang, Xiaoxia, Shi, Zhiwen, Du, Luojun, Dai, Qing, Zhang, Guangyu
Format: Article
Language:English
Subjects:
Charge density waves
Coupling
Excitation spectra
Graphene
Magnetic properties
Optical properties
Phonons
Physical properties
Quantum phenomena
Raman spectra
Raman spectroscopy
Stacking
Superconductivity
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Summary: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 significantly stronger electron-infrared phonon coupling strength than the Bernal ABA-stacked trilayer graphene. 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.
ISSN:2331-8422