Temperature dependence of the lower critical field Hc1 in SmFeASO(0.9)F(0.1) and Ba0.6K0.4Fe2As2 iron-arsenide superconductors

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	Temperature dependence of the lower critical field Hc1 in SmFeASO(0.9)F(0.1) and Ba0.6K0.4Fe2As2 iron-arsenide superconductors
	Ren, C ; Wang, ZS ; Luo, HQ ; Yang, H ; Shan, L ; Wen, HH
刊名	PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
	2009
卷号	469 期号:9-12 页码:599
关键词	MAGNETIC PENETRATION DEPTH LAYERED SUPERCONDUCTOR II SUPERCONDUCTORS GAP LAO0.9F0.1-DELTA-FEAS SPECTROSCOPY MGB2
ISSN号	0921-4534
通讯作者	Ren, C (reprint author), Chinese Acad Sci, Natl Lab Superconduct, Inst Phys, POB 603, Beijing 100190, Peoples R China.
中文摘要	We report detailed measurements of the temperature dependence of the lower critical field H-c1 of the FeAs-based Superconductor SmFeAsO0.9F0.1 (Sm-1111) and Ba0.6K0.4Fe2As2 (BaK-122) by global and local magnetization measurements. It is found that the obtained H-c1 for both kinds of samples show a weak temperature dependence in low temperature region. We argue that this weak T-dependence of H-c1 of Sm-1111 does not indicate a conventional s-wave state, instead it satisfies a T-2 dependence up to a temperature of (0.5-0.6) T-c. In contrast, the data of H-c1(T) of BaK-122 superconductor clearly show a multigap behavior. Excellent fitting to the data can be reached with two s-wave superconducting gaps. Comparison of the absolute values of H-c1(0) between Sm-1111 and BaK-122 shows a relatively large superfluid density for the latter. This may indicate the distinction between the electron doped and hole-doped FeAs-based superconductors. (C) 2009 Elsevier B.V. All rights reserved.
收录类别	SCI
资助信息	National Science Foundation of China; Ministry of Science and Technology of China [2006CB60100, 2006CB921107, 2006CB921802]; Chinese Academy of Sciences
语种	英语
公开日期	2013-09-23
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/44776]
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	Ren, C,Wang, ZS,Luo, HQ,et al. Temperature dependence of the lower critical field Hc1 in SmFeASO(0.9)F(0.1) and Ba0.6K0.4Fe2As2 iron-arsenide superconductors[J]. PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS,2009,469(9-12):599.
APA	Ren, C,Wang, ZS,Luo, HQ,Yang, H,Shan, L,&Wen, HH.(2009).Temperature dependence of the lower critical field Hc1 in SmFeASO(0.9)F(0.1) and Ba0.6K0.4Fe2As2 iron-arsenide superconductors.PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS,469(9-12),599.
MLA	Ren, C,et al."Temperature dependence of the lower critical field Hc1 in SmFeASO(0.9)F(0.1) and Ba0.6K0.4Fe2As2 iron-arsenide superconductors".PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS 469.9-12(2009):599.