Anisotropic spin fluctuations and multiple superconducting gaps in hole-doped Ba0.72K0.28Fe2As2: NMR in a single crystal

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	Anisotropic spin fluctuations and multiple superconducting gaps in hole-doped Ba0.72K0.28Fe2As2: NMR in a single crystal
	Matano, K ; Li, Z ; Sun, GL ; Sun, DL ; Lin, CT ; Ichioka, M ; Zheng, GQ
刊名	EPL
	2009
卷号	87 期号:2
关键词	DENSITY-WAVE YBA2CU3O7 COMPOUND STATE NQR
ISSN号	0295-5075
通讯作者	Matano, K: Okayama Univ, Dept Phys, Okayama 7008530, Japan.
中文摘要	We report the As-75-NMR study on a single crystal of the hole-doped iron-pnictide superconductor Ba0.72K0.28Fe2As2 (T-c = 31.5 K). We find that the Fe antiferromagnetic spin fluctuations are anisotropic and are weaker compared to underdoped copper-oxides or cobalt-oxide superconductors. The spin lattice relaxation rate 1/T-1 decreases below T-c with no coherence peak and shows a stepwise variation at low temperatures, which is indicative of multiple superconducting gaps, as in the electron-doped Pr(La) FeAsO1-xFx. Furthermore, no evidence was obtained for a microscopic coexistence of a long-range magnetic order and superconductivity. Copyright (C) EPLA, 2009
收录类别	SCI
资助信息	MEXT; JSPS [20244058, 17072005]
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/311004/33794]
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	Matano, K,Li, Z,Sun, GL,et al. Anisotropic spin fluctuations and multiple superconducting gaps in hole-doped Ba0.72K0.28Fe2As2: NMR in a single crystal[J]. EPL,2009,87(2).
APA	Matano, K.,Li, Z.,Sun, GL.,Sun, DL.,Lin, CT.,...&Zheng, GQ.(2009).Anisotropic spin fluctuations and multiple superconducting gaps in hole-doped Ba0.72K0.28Fe2As2: NMR in a single crystal.EPL,87(2).
MLA	Matano, K,et al."Anisotropic spin fluctuations and multiple superconducting gaps in hole-doped Ba0.72K0.28Fe2As2: NMR in a single crystal".EPL 87.2(2009).