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Surface-Limited Superconducting Phase Transition on 1T-TaS2

文献类型：期刊论文

作者Loh, Kian Ping4; Xu, Hai2,4; Chu, Leiqiang4; Fu, Wei4; Zhu, Junfa1; Ju, Huanxin1; Yu, Wei4; Cao, Liang2; Abdelwahab, Ibrahim4; Sun, Yi-Yang3
刊名ACS NANO
出版日期2018-12-01
卷号12期号:12页码:12619-12628
关键词2D materials TaS2 superconducting surface phase transition charge density wave
ISSN号1936-0851
DOI10.1021/acsnano.8b07379
通讯作者Xu, Hai(phyxuh@gmail.com) ; Loh, Kian Ping(chmlohkp@nus.edu.sg)
英文摘要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.
WOS关键词CHARGE-DENSITY WAVES ; SCANNING-TUNNELING-MICROSCOPY ; MOTT-INSULATING STATE ; ENHANCED SUPERCONDUCTIVITY ; ELECTRONIC-STRUCTURES ; CRITICAL FIELD ; 2H-TAS2 ; MONOLAYER ; 2H-NBSE2 ; 4HB-TAS2
资助项目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
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science
语种英语
WOS记录号WOS:000454567500085
出版者AMER CHEMICAL SOC
资助机构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
源URL[http://ir.ciomp.ac.cn/handle/181722/60123]  
专题中国科学院长春光学精密机械与物理研究所
通讯作者Loh, Kian Ping; Xu, Hai
作者单位1.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, Changchun Inst Opt Fine Mech & Phys, Changchun 130033, Jilin, Peoples R China
3.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 201899, Peoples R China
4.Natl Univ Singapore, Dept Chem, Ctr Adv 2D Mat, Singapore 117543, Singapore
推荐引用方式
GB/T 7714		 Loh, Kian Ping,Xu, Hai,Chu, Leiqiang,et al. Surface-Limited Superconducting Phase Transition on 1T-TaS2[J]. ACS NANO,2018,12(12):12619-12628.
APA Loh, Kian Ping.,Xu, Hai.,Chu, Leiqiang.,Fu, Wei.,Zhu, Junfa.,...&Wang, Ziying.(2018).Surface-Limited Superconducting Phase Transition on 1T-TaS2.ACS NANO,12(12),12619-12628.
MLA Loh, Kian Ping,et al."Surface-Limited Superconducting Phase Transition on 1T-TaS2".ACS NANO 12.12(2018):12619-12628.

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来源：长春光学精密机械与物理研究所

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