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Layer-Stacking, Defects, and Robust Superconductivity on the Mo-Terminated Surface of Ultrathin Mo2C Flakes Grown by CVD

文献类型：期刊论文

作者Zhang, Zongyuan1; Gedeon, Habakubaho1; Cheng, Zhengwang1; Xu, Chuan4; Shao, Zhibin1; Sun, Haigen1; Li, Shaojian1; Cao, Yan1; Zhang, Xin1; Bian, Qi1
刊名NANO LETTERS
出版日期2019-05-01
卷号19期号:5页码:3327-3335
ISSN号1530-6984
关键词Ultrathin alpha-Mo2C flakes scanning tunneling microscopy/spectroscopy layer stacking structural defects superconductivity
DOI10.1021/acs.nanolett.9b00972
通讯作者Ren, Wencai(wcren@imr.ac.cn) ; Pan, Minghu(minghupan@hust.edu.cn)
英文摘要Materials can exhibit exotic properties when they approach the two-dimensional (2D) limit. Because of promising applications in catalysis and energy storage, 2D transition-metal carbides (TMCs) have attracted considerable attention in recent years. Among these TMCs, ultrathin crystalline alpha-Mo2C flakes have been fabricated by chemical vapor deposition on Cu/Mo bilayer foils, and their 2D superconducting property was revealed by transport measurements. Herein, we studied the ultrathin alpha-Mo2C flakes by atomic-resolved scanning tunneling microscopy/spectroscopy (STM/S). Strain-related structural modulation and the coexistence of different layer-stacking modes are observed on the Mo-terminated surface of alpha-Mo2C flakes as well as various lattice defects. Furthermore, an enhanced superconductivity with shorter correlation length was observed by STS technique, and such superconductivity is very robust despite the appearance of the defects. A mechanism of superconducting enhancement is proposed based on the strain-induced strong coupling and the increased disordering originated from lattice defects. Our results provide a comprehensive understanding of the correlations between atomic structure, defects, and enhanced superconductivity of this emerging 2D material.
资助项目National Natural Science Foundation of China[11574095] ; National Natural Science Foundation of China[51325205] ; National Natural Science Foundation of China[51290273] ; National Natural Science Foundation of China[51802314] ; SYNL-T.S. K Research Fellowship ; Strategic Priority Research Program of Chinese Academy of Sciences[XDB30000000]
WOS研究方向Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种英语
出版者AMER CHEMICAL SOC
WOS记录号WOS:000467781900072
资助机构National Natural Science Foundation of China ; SYNL-T.S. K Research Fellowship ; Strategic Priority Research Program of Chinese Academy of Sciences
源URL[http://ir.imr.ac.cn/handle/321006/133567]  
专题金属研究所_中国科学院金属研究所
通讯作者Ren, Wencai; Pan, Minghu
作者单位1.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Hubei, Peoples R China
2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
3.Tsinghua Univ, TBSI, 1001 Xueyuan Rd, Shenzhen 518055, Peoples R China
4.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Zongyuan,Gedeon, Habakubaho,Cheng, Zhengwang,et al. Layer-Stacking, Defects, and Robust Superconductivity on the Mo-Terminated Surface of Ultrathin Mo2C Flakes Grown by CVD[J]. NANO LETTERS,2019,19(5):3327-3335.
APA Zhang, Zongyuan.,Gedeon, Habakubaho.,Cheng, Zhengwang.,Xu, Chuan.,Shao, Zhibin.,...&Pan, Minghu.(2019).Layer-Stacking, Defects, and Robust Superconductivity on the Mo-Terminated Surface of Ultrathin Mo2C Flakes Grown by CVD.NANO LETTERS,19(5),3327-3335.
MLA Zhang, Zongyuan,et al."Layer-Stacking, Defects, and Robust Superconductivity on the Mo-Terminated Surface of Ultrathin Mo2C Flakes Grown by CVD".NANO LETTERS 19.5(2019):3327-3335.

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来源：金属研究所

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