Evidence of multiple nodeless energy gaps in superconducting Ba0.6K0.4Fe2As2 single crystals from scanning tunneling spectroscopy

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	Evidence of multiple nodeless energy gaps in superconducting Ba0.6K0.4Fe2As2 single crystals from scanning tunneling spectroscopy
	Shan, L ; Wang, YL ; Gong, J ; Shen, B ; Huang, Y ; Yang, HA ; Ren, C ; Wen, HH
刊名	PHYSICAL REVIEW B
	2011
卷号	83 期号:6
关键词	RESOLVED PHOTOEMISSION-SPECTROSCOPY
ISSN号	1098-0121
通讯作者	Shan, L: Chinese Acad Sci, Natl Lab Superconduct, Inst Phys, POB 603, Beijing 100190, Peoples R China.
中文摘要	We report on low-temperature scanning tunneling microscopy and spectroscopy (STM) studies of the electronic structure of single-crystalline Ba0.6K0.4Fe2As2. Multiple superconducting gaps are observed in the density of states (DOS) and the sizes of the two dominant gaps Delta(L) and Delta(S) are 7.6 and 3.3 meV, respectively. The flat bottom of the DOS spectra near zero bias indicates the nodeless feature of the gaps, while the global fitting to the spectra definitely requires the anisotropy. The nodeless gaps with finite anisotropy revealed in our STM data agree well with the expectations of an extended s-wave superconductivity.
收录类别	SCI
资助信息	Natural Science Foundation of China; Ministry of Science and Technology of China [2011CBA00100, 2010CB923002]; Chinese Academy of Sciences
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/37625]
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	Shan, L,Wang, YL,Gong, J,et al. Evidence of multiple nodeless energy gaps in superconducting Ba0.6K0.4Fe2As2 single crystals from scanning tunneling spectroscopy[J]. PHYSICAL REVIEW B,2011,83(6).
APA	Shan, L.,Wang, YL.,Gong, J.,Shen, B.,Huang, Y.,...&Wen, HH.(2011).Evidence of multiple nodeless energy gaps in superconducting Ba0.6K0.4Fe2As2 single crystals from scanning tunneling spectroscopy.PHYSICAL REVIEW B,83(6).
MLA	Shan, L,et al."Evidence of multiple nodeless energy gaps in superconducting Ba0.6K0.4Fe2As2 single crystals from scanning tunneling spectroscopy".PHYSICAL REVIEW B 83.6(2011).