Surface-Limited Superconducting Phase Transition on 1T-TaS2

doi:10.1021/acsnano.8b07379

CIOMP OpenIR

	Surface-Limited Superconducting Phase Transition on 1T-TaS2
	Wang, Ziying 1; Sun, Yi-Yang 2; Abdelwahab, Ibrahim 1; Cao, Liang 3; Yu, Wei 1; Ju, Huanxin 4; Zhu, Junfa 4; Fu, Wei 1; Chu, Leiqiang 1; Xu, Hai 1,3; Loh, Kian Ping 1
	2018-12-01
Source Publication	ACS NANO
ISSN	1936-0851
Volume	12 Issue:12 Pages:12619-12628
Corresponding Author	Xu, Hai(phyxuh@gmail.com) ; Loh, Kian Ping(chmlohkp@nus.edu.sg)
Abstract	Controlling superconducting phase transition on a two-dimensional (2D) material is of great fundamental and technological interest from the viewpoint of making 2D resistance-free electronic circuits. Here, we demonstrate that a 1T-to-2H phase transition can be induced on the topmost monolayer of bulk (<100 nm thick) 1T-TaS2 by thermal annealing. The monolayer 2H-TaS2 on bulk 1T-TaS2 exhibits a superconducting transition temperature (T-c) of 2.1 K, which is significantly enhanced compared to that of bulk 2H-TaS2. Scanning tunneling microscopy measurements reveal a 3 X 3 charge density wave (CDW) in the phase-switched monolayer at 4.5 K. The enhanced Tc is explained by the suppressed 3 X 3 CDW and a charge-transfer doping from the IT substrate. We further show that the monolayer 2H-TaS2 could be switched back to 1T phase by applying a voltage pulse. The observed surface-limited superconducting phase transition offers a convenient way to prepare robust 2D superconductivity on bulk 1T-TaS2 crystal, thereby bypassing the need to exfoliate monolayer samples.
Keyword	2D materials TaS2 superconducting surface phase transition charge density wave
DOI	10.1021/acsnano.8b07379
WOS Keyword	CHARGE-DENSITY WAVES ; SCANNING-TUNNELING-MICROSCOPY ; MOTT-INSULATING STATE ; ENHANCED SUPERCONDUCTIVITY ; ELECTRONIC-STRUCTURES ; CRITICAL FIELD ; 2H-TAS2 ; MONOLAYER ; 2H-NBSE2 ; 4HB-TAS2
Indexed By	SCI
Language	英语
Funding Project	National Research Foundation, Prime Minister's office, Midsized Centre Fund ; National Natural Science Foundation of China[11774341] ; National Natural Science Foundation of China[11574317] ; National Natural Science Foundation of China[21503233] ; National Natural Science Foundation of China[11774365] ; State Key Laboratory of Luminescence and Applications[SKLA-2018-02] ; 100 Talents Program of the Chinese Academy of Sciences
Funding Organization	National Research Foundation, Prime Minister's office, Midsized Centre Fund ; National Natural Science Foundation of China ; State Key Laboratory of Luminescence and Applications ; 100 Talents Program of the Chinese Academy of Sciences
WOS Research Area	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS Subject	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS ID	WOS:000454567500085
Publisher	AMER CHEMICAL SOC
Citation statistics
Document Type	期刊论文
Identifier	http://ir.ciomp.ac.cn/handle/181722/60122
Collection	中国科学院长春光学精密机械与物理研究所
Corresponding Author	Xu, Hai; Loh, Kian Ping
Affiliation	1.Natl Univ Singapore, Dept Chem, Ctr Adv 2D Mat, Singapore 117543, Singapore 2.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 201899, Peoples R China 3.Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Changchun 130033, Jilin, Peoples R China 4.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China
Recommended Citation GB/T 7714	Wang, Ziying,Sun, Yi-Yang,Abdelwahab, Ibrahim,et al. Surface-Limited Superconducting Phase Transition on 1T-TaS2[J]. ACS NANO,2018,12(12):12619-12628.
APA	Wang, Ziying.,Sun, Yi-Yang.,Abdelwahab, Ibrahim.,Cao, Liang.,Yu, Wei.,...&Loh, Kian Ping.(2018).Surface-Limited Superconducting Phase Transition on 1T-TaS2.ACS NANO,12(12),12619-12628.
MLA	Wang, Ziying,et al."Surface-Limited Superconducting Phase Transition on 1T-TaS2".ACS NANO 12.12(2018):12619-12628.

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中国科学院长春光学精密机械与物理研究所