CIOMP OpenIR
Surface-Limited Superconducting Phase Transition on 1T-TaS2
Wang, Ziying1; Sun, Yi-Yang2; Abdelwahab, Ibrahim1; Cao, Liang3; Yu, Wei1; Ju, Huanxin4; Zhu, Junfa4; Fu, Wei1; Chu, Leiqiang1; Xu, Hai1,3; Loh, Kian Ping1
2018-12-01
Source PublicationACS NANO
ISSN1936-0851
Volume12Issue:12Pages:12619-12628
Corresponding AuthorXu, Hai(phyxuh@gmail.com) ; Loh, Kian Ping(chmlohkp@nus.edu.sg)
AbstractControlling 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.
Keyword2D materials TaS2 superconducting surface phase transition charge density wave
DOI10.1021/acsnano.8b07379
WOS KeywordCHARGE-DENSITY WAVES ; SCANNING-TUNNELING-MICROSCOPY ; MOTT-INSULATING STATE ; ENHANCED SUPERCONDUCTIVITY ; ELECTRONIC-STRUCTURES ; CRITICAL FIELD ; 2H-TAS2 ; MONOLAYER ; 2H-NBSE2 ; 4HB-TAS2
Indexed BySCI
Language英语
Funding ProjectNational 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 OrganizationNational 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 AreaChemistry ; Science & Technology - Other Topics ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000454567500085
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/60123
Collection中国科学院长春光学精密机械与物理研究所
Corresponding AuthorXu, Hai; Loh, Kian Ping
Affiliation1.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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