南方科技大学知识苑(SUSTech KC): Obtaining tetragonal FeAs layer and superconducting KxFe2As2 by molecular beam epitaxy

题名	Obtaining tetragonal FeAs layer and superconducting KxFe2As2 by molecular beam epitaxy
作者	Ding, Cui 1,2; Li, Yuanzhao 1; Ji, Shuaihua 1; He, Ke 1; Wang, Lili 1,3; Xue, Qi-Kun1,2,4
通讯作者	Wang, Lili; Xue, Qi-Kun
发表日期	2022-09-01
DOI	10.1007/s12274-022-4956-4
发表期刊	Nano Research 影响因子和分区
ISSN	1998-0124
EISSN	1998-0000
摘要	Atomic characterization on tetragonal FeAs layer and engineering FeAs superlattices is highly desirable to get deep insight into the multi-band superconductivity in iron-pnictides. We fabricate the tetragonal FeAs layer by topotactic reaction of FeTe films with arsenic and then obtain KxFe2As2 upon potassium intercalation using molecular beam epitaxy. The in-situ low-temperature scanning tunneling microscopy/spectroscopy investigations demonstrate characteristic root 2 x root 2 reconstruction of the FeAs layer and stripe pattern of KxFe2As2, accompanied by the development of a superconducting-like gap. The ex-situ transport measurement with FeTe capping layers shows a superconducting transition with an onset temperature of 10 K. This work provides a promising way to characterize the FeAs layer directly and explore rich emergent physics with epitaxial superlattice design.
关键词	tetragonal FeAs KxFe2As2 interface enhanced superconductivity topotactic reaction molecular beam epitaxy
相关链接	[来源记录]
收录类别	SCI
语种	英语
学校署名	通讯
资助项目	National Natural Science Foundation of China["12074210","51788104","11790311","12141403"] ; Basic and Applied Basic Research Major Programme of Guangdong Province of China[2021B0301030003] ; Jihua Laboratory[X210141TL210]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000853447100006
出版者	TSINGHUA UNIV PRESS
来源库	Web of Science
引用统计	被引频次[WOS]：2
成果类型	期刊论文
条目标识符	http://sustech.caswiz.com/handle/2SGJ60CL/402333
专题	理学院_物理系
作者单位	1.Tsinghua Univ, Dept Phys, State Key Lab Low Dimens Quantum Phys, Beijing 100084, Peoples R China 2.Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China 3.Collaborat Innovat Ctr Quantum Matter, Beijing 100084, Peoples R China 4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
通讯作者单位	物理系
推荐引用方式 GB/T 7714	Ding, Cui,Li, Yuanzhao,Ji, Shuaihua,et al. Obtaining tetragonal FeAs layer and superconducting KxFe2As2 by molecular beam epitaxy[J]. Nano Research,2022.
APA	Ding, Cui,Li, Yuanzhao,Ji, Shuaihua,He, Ke,Wang, Lili,&Xue, Qi-Kun.(2022).Obtaining tetragonal FeAs layer and superconducting KxFe2As2 by molecular beam epitaxy.Nano Research.
MLA	Ding, Cui,et al."Obtaining tetragonal FeAs layer and superconducting KxFe2As2 by molecular beam epitaxy".Nano Research (2022).