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Magnetic Doping Induced Superconductivity-to-Incommensurate Density Waves Transition in a 2D Ultrathin Cr-Doped Mo2C Crystal

文献类型：期刊论文

作者Li, Shaojian1; Zhang, Zongyuan1,2; Xu, Chuan3; Liu, Zhen4,5; Chen, Xiaorui6; Bian, Qi1; Gedeon, Habakubaho1; Shao, Zhibin6; Liu, Lijun1; Liu, Zhibo3
刊名ACS NANO
出版日期2021-09-28
卷号15期号:9页码:14938-14946
ISSN号1936-0851
关键词2D material transition-metal carbide magnetic doping incommensurate density wave superconductivity
DOI10.1021/acsnano.1c05133
通讯作者Kang, Ning(nkang@pku.edu.cn) ; Ren, Wencai(wcren@imr.ac.cn) ; Pan, Minghu(minghupan@hust.edu.cn)
英文摘要In the vicinity of a competing electronic order, superconductivity emerges within a superconducting dome in the phase diagram, which has been demonstrated in unconventional superconductors and transition-metal dichalcogenides (TMDs), suggesting a scenario where fluctuations or a partial melting of a parent order are essential for inducing superconductivity. Here, we present a contrary example, the two-dimensional (2D) superconductivity in transition-metal carbide can be readily turned into charge density wave (CDW) phases via dilute magnetic doping. Low temperature scanning tunneling microscopy/spectroscopy (STM/STS), transport measurements, and density functional theory (DFT) calculations were employed to investigate Cr-doped superconducting Mo2C crystals in the 2D limit. With ultralow Cr doping (2.7 atom %), the superconductivity of Mo2C is heavily suppressed. Strikingly, an incommensurate density wave (IDW) and a related partially opened gap are observed at a temperature above the superconducting regime. The wave vector of IDW agrees well with the calculated Fermi surface nesting vectors. By further increasing the Cr doping level to 9.4 atom %, a stronger IDW with a smaller periodicity and a larger partial gap appear concurrently. The resistance anomaly implies the onset of the CDW phase. Spatial-resolved and temperature-dependent spectroscopy reveals that such CDW phases exist only in a nonsuperconducting regime and could form long-range orders uniformly. The results provide the understanding for the interplay between charge ordered states and superconductivity in 2D transition-metal carbide.
资助项目Ministry of Science and Technology of China[2016YFA0200101] ; Ministry of Science and Technology of China[2017YFA0303304] ; National Science Foundation of China[51325205] ; National Science Foundation of China[51290273] ; National Science Foundation of China[51521091] ; National Science Foundation of China[11574095] ; National Science Foundation of China[91745115] ; National Science Foundation of China[11974026] ; National Science Foundation of China[51802314] ; National Science Foundation of China[51802315] ; National Science Foundation of China[12004234] ; Chinese Academy of Sciences[XDB30000000] ; Chinese Academy of Sciences[ZDBS-LYJSC027] ; LiaoNing Revitalization Talents Program[XLYC1808013] ; Institute of Metal Research, Chinese Academy of Sciences (the project Young Merit Scholars) ; Youth Innovation Promotion Association of Chinese Academy of Sciences[2018223] ; Program for Guangdong Introducing Innovative and Entrepreneurial Teams[2017ZT07C341] ; Economic, Trade and Information Commission of Shenzhen Municipality[201901171523] ; Development and Reform Commission of Shenzhen Municipality ; Postdoctoral Innovative Talent Support Program of China[BX20200202]
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science
语种英语
出版者AMER CHEMICAL SOC
WOS记录号WOS:000703553600089
资助机构Ministry of Science and Technology of China ; National Science Foundation of China ; Chinese Academy of Sciences ; LiaoNing Revitalization Talents Program ; Institute of Metal Research, Chinese Academy of Sciences (the project Young Merit Scholars) ; Youth Innovation Promotion Association of Chinese Academy of Sciences ; Program for Guangdong Introducing Innovative and Entrepreneurial Teams ; Economic, Trade and Information Commission of Shenzhen Municipality ; Development and Reform Commission of Shenzhen Municipality ; Postdoctoral Innovative Talent Support Program of China
源URL[http://ir.imr.ac.cn/handle/321006/166797]  
专题金属研究所_中国科学院金属研究所
通讯作者Kang, Ning; Ren, Wencai; Pan, Minghu
作者单位1.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
2.Anhui Univ, Inst Phys Sci, Key Lab Struct & Funct Regulat Hybrid Mat, Minist Educ, Hefei 230601, Peoples R China
3.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
4.Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China
5.Peking Univ, Dept Elect, Beijing 100871, Peoples R China
6.Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710119, Peoples R China
7.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
8.Tsinghua Univ, Shenzhen Geim Graphene Ctr, Tsinghua Berkeley Shenzhen Inst TBSI, Shenzhen 518055, Peoples R China
推荐引用方式
GB/T 7714		 Li, Shaojian,Zhang, Zongyuan,Xu, Chuan,et al. Magnetic Doping Induced Superconductivity-to-Incommensurate Density Waves Transition in a 2D Ultrathin Cr-Doped Mo2C Crystal[J]. ACS NANO,2021,15(9):14938-14946.
APA Li, Shaojian.,Zhang, Zongyuan.,Xu, Chuan.,Liu, Zhen.,Chen, Xiaorui.,...&Pan, Minghu.(2021).Magnetic Doping Induced Superconductivity-to-Incommensurate Density Waves Transition in a 2D Ultrathin Cr-Doped Mo2C Crystal.ACS NANO,15(9),14938-14946.
MLA Li, Shaojian,et al."Magnetic Doping Induced Superconductivity-to-Incommensurate Density Waves Transition in a 2D Ultrathin Cr-Doped Mo2C Crystal".ACS NANO 15.9(2021):14938-14946.

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来源：金属研究所

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