A Resonance-Sensitive Ultralow-Frequency Raman Mode in Twisted Bilayer Graphene

doi:10.1021/acs.nanolett.4c01018

IMR OpenIR

	A Resonance-Sensitive Ultralow-Frequency Raman Mode in Twisted Bilayer Graphene
	Yan, Shuowen 1; Huang, Jianqi 2,3,4; Hao, He 1; Song, Ge 1; Wang, Yuechen 1,5,6; Peng, Hailin 1,5,6; Yang, Teng 2,3,4; Zhang, Jin 1; Tong, Lianming 1
通讯作者	Tong, Lianming(tonglm@pku.edu.cn)
	2024-06-20
发表期刊	NANO LETTERS
ISSN	1530-6984
卷号	24 期号:26 页码:7879-7885
摘要	Twisted bilayer graphene (tBLG) possesses intriguing physical properties including unconventional superconductivity, enhanced light-matter interaction due to the formation of van Hove singularities (vHS), and a divergence of density of states in the electronic band structures. The vHS energy band gap provides optical resonant transition channels that can be tuned by the twist angle and interlayer coupling. Raman spectroscopy provides rich information on the vHS structure of tBLG. Here, we report the discovery of an ultralow-frequency Raman mode at similar to 49 cm(-1) in tBLG. This mode is assigned to the combination of ZA (an out-of-plane acoustic phonon) and TA (a transverse acoustic phonon) phonons, and the Raman scattering is proposed to occur at the so-called mini-valley. This mode is found to be particularly sensitive to the change in vHS in tBLG. Our findings may deepen the understanding of Raman scattering in tBLG and help to reveal vHS-related electron-phonon interactions in tBLG.
关键词	twisted bilayer graphene (tBLG) van Hove singularity(vHS) resonance Raman scattering anti-Stokes Ramanscattering
资助者	National Natural Science Foundation of China ; National Key R&D Program of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of CAS ; Beijing National Laboratory for Molecular Sciences ; Shenzhen Science and Technology Innovation Commission
DOI	10.1021/acs.nanolett.4c01018
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[2022YFA1203302] ; National Natural Science Foundation of China[2022YFA1203304] ; National Natural Science Foundation of China[2018YFA0703502] ; National Key R&D Program of China[52303291] ; National Key R&D Program of China[52021006] ; National Key R&D Program of China[21974004] ; National Natural Science Foundation of China[XDB36030100] ; Strategic Priority Research Program of CAS[BNLMS-CXTD-202001] ; Beijing National Laboratory for Molecular Sciences[KQTD20221101115627004] ; Shenzhen Science and Technology Innovation Commission
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:001252054400001
出版者	AMER CHEMICAL SOC
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/187326
专题	中国科学院金属研究所
通讯作者	Tong, Lianming
作者单位	1.Peking Univ, Beijing Sci & Engn Ctr Nanocarbons, Beijing Natl Lab Mol Sci, Ctr Nanochem,Coll Chem & Mol Engn, Beijing 100871, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 4.Liaoning Acad Mat, Shenyang 110167, Peoples R China 5.Beijing Graphene Inst, Beijing 100095, Peoples R China 6.Peking Univ, Acad Adv Interdisciplinary Studies, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Yan, Shuowen,Huang, Jianqi,Hao, He,et al. A Resonance-Sensitive Ultralow-Frequency Raman Mode in Twisted Bilayer Graphene[J]. NANO LETTERS,2024,24(26):7879-7885.
APA	Yan, Shuowen.,Huang, Jianqi.,Hao, He.,Song, Ge.,Wang, Yuechen.,...&Tong, Lianming.(2024).A Resonance-Sensitive Ultralow-Frequency Raman Mode in Twisted Bilayer Graphene.NANO LETTERS,24(26),7879-7885.
MLA	Yan, Shuowen,et al."A Resonance-Sensitive Ultralow-Frequency Raman Mode in Twisted Bilayer Graphene".NANO LETTERS 24.26(2024):7879-7885.