Changchun Institute of Optics,Fine Mechanics and Physics,CAS
| 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 | |
| 发表期刊 | ACS NANO
 |
| ISSN | 1936-0851 |
| 卷号 | 12期号:12页码:12619-12628 |
| 通讯作者 | Xu, Hai(phyxuh@gmail.com) ; Loh, Kian Ping(chmlohkp@nus.edu.sg) |
| 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. |
| 关键词 | 2D materials TaS2 superconducting surface phase transition charge density wave |
| DOI | 10.1021/acsnano.8b07379 |
| 关键词[WOS] | CHARGE-DENSITY WAVES ; SCANNING-TUNNELING-MICROSCOPY ; MOTT-INSULATING STATE ; ENHANCED SUPERCONDUCTIVITY ; ELECTRONIC-STRUCTURES ; CRITICAL FIELD ; 2H-TAS2 ; MONOLAYER ; 2H-NBSE2 ; 4HB-TAS2 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 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 |
| 项目资助者 | 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研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| WOS类目 | Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| WOS记录号 | WOS:000454567500085 |
| 出版者 | AMER CHEMICAL SOC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.ciomp.ac.cn/handle/181722/60122 |
| 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 | Xu, Hai; Loh, Kian Ping |
| 作者单位 | 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 |
| 推荐引用方式 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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| Surface-Limited Supe（670KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | 浏览 下载 | |
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