南方科技大学知识苑(SUSTech KC): Observation of Ultrastrong Coupling between Substrate and the Magnetic Topological Insulator MnBi2Te4

题名	Observation of Ultrastrong Coupling between Substrate and the Magnetic Topological Insulator MnBi2Te4
作者	Li, Gaomin1,2 ; Wu, Xiaohua1 ; Gao, Yifan1 ; Ma, Xiaoming3 ; Hou, Fuchen1 ; Cheng, Hanyan1 ; Huang, Qiaoling1 ; Wu, Yueh-Chun 2; DeCapua, Matthew C.2; Zhang, Yujun1 ; Lin, Junhao1 ; Liu, Chang1,3 ; Huang, Li1 ; Zhao, Yue1,3 ; Yan, Jun 2; Huang, Mingyuan1
通讯作者	Zhao, Yue; Yan, Jun; Huang, Mingyuan
发表日期	2022-05-25
DOI	10.1021/acs.nanolett.1c04194
发表期刊	NANO LETTERS 影响因子和分区
ISSN	1530-6984
EISSN	1530-6992
卷号	22 期号:10
摘要	The intrinsic magnetic topological insulator MnBi2Te4has attracted significant interest recently as a promising platform forexploring exotic quantum phenomena. Here we report that, whenatomically thin MnBi2Te4is deposited on a substrate such as siliconoxide or gold, there is a very strong mechanical coupling between theatomic layer and the supporting substrate. This is manifested as anintense low-frequency breathing Raman mode that is present even formonolayer MnBi2Te4. Interestingly, this coupling turns out to bestronger than the interlayer coupling between the MnBi2Te4atomiclayers. We further found that these low-energy breathing modes arehighly sensitive to sample degradation, and they become drasticallyweaker upon ambient air exposure. This is in contrast to the higherenergy optical phonon modes which are much more robust, suggesting that the low-energy Raman modes found here can be aneffective indicator of sample quality.
关键词	MnBi2Te4 Raman spectroscopy layer dependence breathing modes linear chain model
相关链接	[来源记录]
收录类别	SCI ; EI
语种	英语
重要成果	NI论文
学校署名	第一 ; 通讯
资助项目	National Natural Science Foundation of China[12104204] ; Science, Technology and Innovation Commission of Shenzhen Municipality[20200925152344006] ; Initiative Funds for Shenzhen High Class University[G02206301] ; National Science Foundation[DMR-2004474] ; Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06D348] ; Key-Area Research and Development Program of Guangdong Province[2019B010931001] ; China Postdoctoral Science Foundation[2021M691449]
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:000806236600002
出版者	AMER CHEMICAL SOC
ESI学科分类	MATERIALS SCIENCE
来源库	Web of Science
引用统计	被引频次[WOS]：7
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/334873
专题	理学院_物理系量子科学与工程研究院
作者单位	1.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China 2.Univ Massachusetts, Dept Phys, Amherst, MA 01003 USA 3.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
第一作者单位	物理系
通讯作者单位	物理系; 量子科学与工程研究院
第一作者的第一单位	物理系
推荐引用方式 GB/T 7714	Li, Gaomin,Wu, Xiaohua,Gao, Yifan,et al. Observation of Ultrastrong Coupling between Substrate and the Magnetic Topological Insulator MnBi2Te4[J]. NANO LETTERS,2022,22(10).
APA	Li, Gaomin.,Wu, Xiaohua.,Gao, Yifan.,Ma, Xiaoming.,Hou, Fuchen.,...&Huang, Mingyuan.(2022).Observation of Ultrastrong Coupling between Substrate and the Magnetic Topological Insulator MnBi2Te4.NANO LETTERS,22(10).
MLA	Li, Gaomin,et al."Observation of Ultrastrong Coupling between Substrate and the Magnetic Topological Insulator MnBi2Te4".NANO LETTERS 22.10(2022).