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

doi:10.1021/acs.nanolett.9b00972

IMR OpenIR

	Layer-Stacking, Defects, and Robust Superconductivity on the Mo-Terminated Surface of Ultrathin Mo2C Flakes Grown by CVD
	Zhang, Zongyuan 1; Gedeon, Habakubaho 1; Cheng, Zhengwang 1; Xu, Chuan 2; Shao, Zhibin 1; Sun, Haigen 1; Li, Shaojian 1; Cao, Yan 1; Zhang, Xin 1; Bian, Qi 1; Liu, Lijun 1; Liu, Zhibo 2; Cheng, Hui-Ming 2,3,4; Ren, Wencai 2,3; Pan, Minghu 1
通讯作者	Ren, Wencai(wcren@imr.ac.cn) ; Pan, Minghu(minghupan@hust.edu.cn)
	2019-05-01
发表期刊	NANO LETTERS
ISSN	1530-6984
卷号	19 期号:5 页码:3327-3335
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.
关键词	Ultrathin alpha-Mo2C flakes scanning tunneling microscopy/spectroscopy layer stacking structural defects superconductivity
资助者	National Natural Science Foundation of China ; SYNL-T.S. K Research Fellowship ; Strategic Priority Research Program of Chinese Academy of Sciences
DOI	10.1021/acs.nanolett.9b00972
收录类别	SCI
语种	英语
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
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000467781900072
出版者	AMER CHEMICAL SOC
引用统计	被引频次：25[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/133568
专题	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.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 4.Tsinghua Univ, TBSI, 1001 Xueyuan Rd, Shenzhen 518055, 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.