Measurement of a Sign-Changing Two-Gap Superconducting Phase in Electron-Doped Ba(Fe1-xCox)(2)As-2 Single Crystals Using Scanning Tunneling Spectroscopy

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	Measurement of a Sign-Changing Two-Gap Superconducting Phase in Electron-Doped Ba(Fe1-xCox)(2)As-2 Single Crystals Using Scanning Tunneling Spectroscopy
	Teague, ML ; Drayna, GK ; Lockhart, GP ; Cheng, P ; Shen, B ; Wen, HH ; Yeh, NC
刊名	PHYSICAL REVIEW LETTERS
	2011
卷号	106 期号:8
关键词	LOW-ENERGY EXCITATIONS CUPRATE SUPERCONDUCTORS LAYERED SUPERCONDUCTOR 43 K IRON LAO1-XFXFEAS
ISSN号	0031-9007
通讯作者	Teague, ML: CALTECH, Dept Phys, Pasadena, CA 91125 USA.
中文摘要	Scanning tunneling spectroscopic studies of Ba(Fe1-xCox)(2)As-2 (x = 0.06, 0.12) single crystals reveal direct evidence for predominantly two-gap superconductivity. These gaps decrease with increasing temperature and vanish above the superconducting transition T-c. The two-gap nature and the slightly doping-and energy-dependent quasiparticle scattering interferences near the wave vectors (+/-pi, 0) and (0, +/-pi) are consistent with sign-changing s-wave superconductivity. The excess zero-bias conductance and the large gap-to-T-c ratios suggest dominant unitary impurity scattering.
收录类别	SCI
资助信息	NSF [DMR-0907251]; Kavli and Moore Foundations; NSFC; Ministry of Science and Technology of China; Chinese Academy of Sciences
语种	英语
公开日期	2013-09-18
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/41803]
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	Teague, ML,Drayna, GK,Lockhart, GP,et al. Measurement of a Sign-Changing Two-Gap Superconducting Phase in Electron-Doped Ba(Fe1-xCox)(2)As-2 Single Crystals Using Scanning Tunneling Spectroscopy[J]. PHYSICAL REVIEW LETTERS,2011,106(8).
APA	Teague, ML.,Drayna, GK.,Lockhart, GP.,Cheng, P.,Shen, B.,...&Yeh, NC.(2011).Measurement of a Sign-Changing Two-Gap Superconducting Phase in Electron-Doped Ba(Fe1-xCox)(2)As-2 Single Crystals Using Scanning Tunneling Spectroscopy.PHYSICAL REVIEW LETTERS,106(8).
MLA	Teague, ML,et al."Measurement of a Sign-Changing Two-Gap Superconducting Phase in Electron-Doped Ba(Fe1-xCox)(2)As-2 Single Crystals Using Scanning Tunneling Spectroscopy".PHYSICAL REVIEW LETTERS 106.8(2011).