Magnetic penetration-depth measurements of a suppressed superfluid density of superconducting Ca0.5Na0.5Fe2As2 single crystals by proton irradiation

	Magnetic penetration-depth measurements of a suppressed superfluid density of superconducting Ca0.5Na0.5Fe2As2 single crystals by proton irradiation
	Kim, J ; Haberkorn, N ; Graf, MJ ; Usov, I ; Ronning, F ; Civale, L ; Nazaretski, E ; Chen, GF ; Yu, W ; Thompson, JD ; Movshovich, R
刊名	PHYSICAL REVIEW B
	2012
卷号	86 期号:14
关键词	D-WAVE SUPERCONDUCTORS HEAVY-FERMION SUPERCONDUCTORS UNCONVENTIONAL SUPERCONDUCTORS ANISOTROPIC SUPERCONDUCTORS CUPRATE SUPERCONDUCTORS CRITICAL-TEMPERATURE IMPURITY SCATTERING II SUPERCONDUCTORS LEVITATION FORCE YBA2CU3O7-DELTA
ISSN号	1098-0121
通讯作者	Kim, J (reprint author), Los Alamos Natl Lab, POB 1663, Los Alamos, NM 87545 USA.
中文摘要	We report on the dramatic effect of random point defects, produced by proton irradiation, on the superfluid density rho(s) in superconducting Ca0.5Na0.5Fe2As2 single crystals. The magnitude of the suppression is inferred from measurements of the temperature-dependent magnetic penetration depth lambda(T) using magnetic force microscopy. Our findings indicate that a radiation dose of 2 x 10(16) cm(-2) produced by 3 MeV protons results in a reduction of the superconducting critical temperature T-c by approximately 10%. In contrast, rho(s)(0) is suppressed by approximately 60%. This breakdown of the Abrikosov-Gorkov theory may be explained by the so-called "Swiss cheese model," which accounts for the spatial suppression of the order parameter near point defects similar to holes in Swiss cheese. Both the slope of the upper critical field and the penetration depth lambda(T/T-c)/lambda(0) exhibit similar temperature dependences before and after irradiation. This may be due to a combination of the highly disordered nature of Ca0.5Na0.5Fe2As2 with large intraband and simultaneous interband scattering as well as the s(+/-)-wave nature of short coherence length superconductivity.
收录类别	SCI
资助信息	U.S. Department of Energy, Basic Energy Sciences, Division of Materials Sciences and Engineering; U.S. Department of Energy [DE-AC02-98CH10886]; NSFC [10974254, 11074304]; National Basic Research Program of China [2010CB923000, 2011CBA00100]
语种	英语
公开日期	2014-02-20
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/57801]
专题	物理研究所_所内人员在其他单位发表论文题录信息_所内人员在其他单位发表论文题录信息_期刊论文
推荐引用方式 GB/T 7714	Kim, J,Haberkorn, N,Graf, MJ,et al. Magnetic penetration-depth measurements of a suppressed superfluid density of superconducting Ca0.5Na0.5Fe2As2 single crystals by proton irradiation[J]. PHYSICAL REVIEW B,2012,86(14).
APA	Kim, J.,Haberkorn, N.,Graf, MJ.,Usov, I.,Ronning, F.,...&Movshovich, R.(2012).Magnetic penetration-depth measurements of a suppressed superfluid density of superconducting Ca0.5Na0.5Fe2As2 single crystals by proton irradiation.PHYSICAL REVIEW B,86(14).
MLA	Kim, J,et al."Magnetic penetration-depth measurements of a suppressed superfluid density of superconducting Ca0.5Na0.5Fe2As2 single crystals by proton irradiation".PHYSICAL REVIEW B 86.14(2012).