Modulation of electronic state in copper-intercalated 1T-TaS2

doi:10.1007/s12274-021-4034-3

	Modulation of electronic state in copper-intercalated 1T-TaS2
	Zhang, Wenhao 6; Ding, Degong 1; Gao, Jingjing 5; Bu, Kunliang 6; Wu, Zongxiu 6; Wang, Li 4; Li, Fangsen 4; Wang, Wei 5; Luo, Xuan 5; Lu, Wenjian 5
刊名	NANO RESEARCH
	2022-01-15
关键词	intercalation scanning tunneling microscopy Mott insulator charge transfer electron doping
ISSN号	1998-0124
DOI	10.1007/s12274-021-4034-3
通讯作者	Jin, Chuanhong(chhjin@zju.edu.cn) ; Sun, Yuping(ypsun@issp.ac.cn) ; Yin, Yi(yiyin@zju.edu.cn)
英文摘要	Intercalation is an effective method to modify physical properties and induce novel electronic states of transition metal dichalcogenide (TMD) materials. However, it is difficult to reveal the microscopic electronic state evolution in the intercalated TMDs. Here we successfully synthesize the copper-intercalated 1T-TaS2 and characterize the structural and electronic modification combining resistivity measurements, atomic-resolution scanning transmission electron microscopy (ADF-STEM), and scanning tunneling microscopy (STM). The intercalated Cu atom is determined to be directly below the Ta atom and suppresses the commensurate charge density wave (CCDW) phase. Two specific electronic modulations are discovered in the near-commensurate (NC) CDW phase: the electron doping state near the defective star of Davids (SDs) in metallic domains and the spatial evolution of the Mott gap in insulating domains. Both modulations reveal that intercalated Cu atoms act as a medium to enhance the interaction between intralayer SDs, in addition to the general charge transfer effect. It also solidifies the Mott foundation of the insulating gap in pristine samples. The intriguing electronic evolution in Cu-intercalated 1T-TaS2 will motivate further exploration of novel electronic states in the intercalated TMD materials.
资助项目	National Key Research and Development Program[2019YFA0308602] ; National Key Research and Development Program[2016YFA0300404] ; Key Research and Development Program of Zhejiang Province, China[2021C01002] ; Vacuum Interconnected Nanotech Workstation (Nano-X)[B2004] ; Fundamental Research Funds for the Central Universities in China ; National Natural Science Foundation of China[NSFC-51772265] ; National Natural Science Foundation of China[NSFC-61721005] ; Joint Funds of the National Natural Science Foundation of China ; Chinese Academy of Sciences' Large-scale Scientific Facility[U1832141] ; Chinese Academy of Sciences' Large-scale Scientific Facility[U1932217] ; Chinese Academy of Sciences' Large-scale Scientific Facility[U2032215]
WOS关键词	CHARGE-DENSITY WAVES ; MOTT
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	TSINGHUA UNIV PRESS
WOS记录号	WOS:000742821700002
资助机构	National Key Research and Development Program ; Key Research and Development Program of Zhejiang Province, China ; Vacuum Interconnected Nanotech Workstation (Nano-X) ; Fundamental Research Funds for the Central Universities in China ; National Natural Science Foundation of China ; Joint Funds of the National Natural Science Foundation of China ; Chinese Academy of Sciences' Large-scale Scientific Facility
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/127093]
专题	中国科学院合肥物质科学研究院
通讯作者	Jin, Chuanhong; Sun, Yuping; Yin, Yi
作者单位	1.Zhejiang Univ, Sch Mat Sci & Engn, State Key Lab Silicon Mat, Hangzhou 310027, Peoples R China 2.Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China 3.Chinese Acad Sci, High Magnet Field Lab, HFIPS, Hefei 230031, Peoples R China 4.Chinese Acad Sci, Suzhou Inst Nanotech & NanoBion SINANO, Vacuum Interconnected Nanotech Workstn NanoX, Suzhou 215123, Peoples R China 5.Chinese Acad Sci, Inst Solid State Phys, Key Lab Mat Phys, HFIPS, Hefei 230031, Peoples R China 6.Zhejiang Univ, Dept Phys, Zhejiang Prov Key Lab Quantum Technol & Device, Hangzhou 310027, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Wenhao,Ding, Degong,Gao, Jingjing,et al. Modulation of electronic state in copper-intercalated 1T-TaS2[J]. NANO RESEARCH,2022.
APA	Zhang, Wenhao.,Ding, Degong.,Gao, Jingjing.,Bu, Kunliang.,Wu, Zongxiu.,...&Yin, Yi.(2022).Modulation of electronic state in copper-intercalated 1T-TaS2.NANO RESEARCH.
MLA	Zhang, Wenhao,et al."Modulation of electronic state in copper-intercalated 1T-TaS2".NANO RESEARCH (2022).