Scanning tunneling microscopy study of the superconducting properties of three-atomic-layer Pb films

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	Scanning tunneling microscopy study of the superconducting properties of three-atomic-layer Pb films
	Wang, YL ; Chen, M ; Li, Z ; Wang, LL ; He, K ; Xue, QK ; Ma, XC
刊名	APPLIED PHYSICS LETTERS
	2013
卷号	103 期号:24 页码:42603
ISSN号	0003-6951
通讯作者	Wang, Yilin (reprint author), Univ Maryland, Dept Phys, Mat Res Sci & Engn Ctr, College Pk, MD 20742 USA
中文摘要	Ultrathin Pb films with a thickness of three monolayers (ML) were prepared on alpha-root 3 x root 3Pb/Si(111) (Pb-SIC) substrate by molecular beam epitaxy. Despite significant defect scattering, low temperature scanning tunneling microscopy reveals a high superconducting transition temperature T-c of 6.9K, compared with the bulk T-c (7.2 K). By applying external magnetic field, magnetic vortices were directly imaged, which demonstrates the robustness of superconductivity. By comparing to nearly free-standing Pb films on graphitized SiC (0001) substrate, we suggest that the higher Tc of 3 ML Pb films on Pb-SIC originates from the combined effects of quantum confinement and substrate-enhanced electron-phonon coupling. (C) 2013 AIP Publishing LLC.
语种	英语
公开日期	2014-01-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57423]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Wang, YL,Chen, M,Li, Z,et al. Scanning tunneling microscopy study of the superconducting properties of three-atomic-layer Pb films[J]. APPLIED PHYSICS LETTERS,2013,103(24):42603.
APA	Wang, YL.,Chen, M.,Li, Z.,Wang, LL.,He, K.,...&Ma, XC.(2013).Scanning tunneling microscopy study of the superconducting properties of three-atomic-layer Pb films.APPLIED PHYSICS LETTERS,103(24),42603.
MLA	Wang, YL,et al."Scanning tunneling microscopy study of the superconducting properties of three-atomic-layer Pb films".APPLIED PHYSICS LETTERS 103.24(2013):42603.