Superconductivity above 30 K due to the introduction of oxygen in CaFeAsF

doi:10.1039/d4tc03994g

	Superconductivity above 30 K due to the introduction of oxygen in CaFeAsF
	Liu, Yixin 1,2; Wang, Teng1,3 ; Xu, Zulei 1,2; Jiang, Da 1,4; Zhao, Yi3 ; Qi, Yanpeng3,5,6 ; Wang, Xiaoni 1,2; Yang, Ming 1,7; Ye, Mao 1,2; Peng, Wei 1,2; Mu, Gang 1,2
	2024-11-01
发表期刊	JOURNAL OF MATERIALS CHEMISTRY C (IF:5.7[JCR-2023],6.0[5-Year])
ISSN	2050-7526
EISSN	2050-7534
发表状态	已发表
DOI	10.1039/d4tc03994g
摘要	Exploring new unconventional superconductors is of great value for both fundamental research and practical applications. It is a long-term challenge to develop and study more hole-doped superconductors in the 1111 system of iron-based superconductors. Here we report the discovery of superconductivity with a critical transition temperature up to 30.7 K in the compound CaFeAsF by a post-annealing treatment in an air atmosphere. The superconducting behaviors are verified in both the single-crystalline and polycrystalline samples by the resistance and magnetization measurements. The analysis by combining the depth-resolved time-of-flight secondary ion mass spectrometry (TOF-SIMS) and X-ray photoelectron spectroscopy (XPS) measurements shows that the introduction of oxygen and the consequent change in Fe valence by the annealing treatment may lead to hole-type doping, which is the origin of the occurrence of superconductivity. Our results pave the way for further in-depth investigations on the hole-doped 1111 system in iron-based superconductors.
关键词	Annealing Electron spin resonance spectroscopy Emotional intelligence Iron Iron compounds Iron-based Superconductors Penetration depth (superconductivity) Secondary ion mass spectrometry Semiconductor doping Superconducting transition temperature Air atmosphere Critical transition temperatures Crystalline samples Doped superconductors Fundamental research Iron-based Post annealing treatment Single-crystalline Superconducting behavior Unconventional superconductors
URL	查看原文
收录类别	SCI ; EI
语种	英语
资助项目	National Natural Science Foundation of China[
WOS研究方向	Materials Science ; Physics
WOS类目	Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:001367576500001
出版者	ROYAL SOC CHEMISTRY
EI入藏号	20244917491121
EI主题词	X ray photoelectron spectroscopy
EI分类号	1301.1.3.1 ; 201.7.1 ; 202.5.1 ; 701.1 Electricity: Basic Concepts and Phenomena ; 708.3 Superconducting Materials ; 708.3.1 High Temperature Superconducting Materials ; 712.1 Semiconducting Materials ; 805 Chemical Engineering, General ; 903.2 Information Dissemination
原始文献类型	Article in Press
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/458318
专题	物质科学与技术学院物质科学与技术学院_PI研究组_齐彦鹏组物质科学与技术学院_博士生
通讯作者	Mu, Gang
作者单位	1.Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Mat Integrated Circuits, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China 4.Zhejiang Univ Technol, Inst Frontiers & Interdisciplinary Sci, Hangzhou 310014, Peoples R China 5.ShanghaiTech Univ, ShanghaiTech Lab Topol Phys, Shanghai 201210, Peoples R China 6.ShanghaiTech Univ, Shanghai Key Lab High Resolut Electron Microscopy, Shanghai 201210, Peoples R China 7.Shanghai Univ, Sch Microelect, Shanghai 200444, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yixin,Wang, Teng,Xu, Zulei,et al. Superconductivity above 30 K due to the introduction of oxygen in CaFeAsF[J]. JOURNAL OF MATERIALS CHEMISTRY C,2024.
APA	Liu, Yixin.,Wang, Teng.,Xu, Zulei.,Jiang, Da.,Zhao, Yi.,...&Mu, Gang.(2024).Superconductivity above 30 K due to the introduction of oxygen in CaFeAsF.JOURNAL OF MATERIALS CHEMISTRY C.
MLA	Liu, Yixin,et al."Superconductivity above 30 K due to the introduction of oxygen in CaFeAsF".JOURNAL OF MATERIALS CHEMISTRY C (2024).