Multiple superconducting gap and anisotropic spin fluctuations in iron arsenides: Comparison with nickel analog
文献类型：期刊论文
| 作者 | Li, Z ; Kawasaki, S ; Oka, T ; Tabuchi, T ; Ooe, Y ; Ichioka, M ; Ren, ZA ; Zhao, ZX ; Luo, JL ; Wang, NL ; Wang, XC ; Liu, QQ ; Jin, CQ ; Lin, CT ; Zheng, GQ |
| 刊名 | JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
 |
| 出版日期 | 2011 |
| 卷号 | 72期号:5页码:492 |
| 关键词 | LAYERED QUATERNARY COMPOUND |
| ISSN号 | 0022-3697 |
| 通讯作者 | Zheng, GQ: Okayama Univ, Dept Phys, Okayama 7008530, Japan. |
| 中文摘要 | We present extensive (75)As NMR and NQR data on the superconducting arsenides PrFeAs(0.89)F(0.11) (T(c) = 45 K), LaFeAsO(0.92)F(0.08) (T(c) = 27 K), LiFeAs (T(c) = 17 K) and Ba(0.72)K(0.28)Fe(2)As(2) (T(c) = 31.5 K) single crystal, and compare with the nickel analog LaNiAsO(0.9)F(0.1) (T(c) = 4.0 K). In contrast to LaNiAsO(0.9)F(0.1) where the superconducting gap is shown to be isotropic, the spin lattice relaxation rate 1/T(1) in the Fe-arsenides decreases below T(c) with no coherence peak and shows a step-wise variation at low temperatures. The Knight shift decreases below T(c) and shows a step-wise T variation as well. These results indicate spin-singlet superconductivity with multiple gaps in the Fe-arsenides. The Fe antiferromagnetic spin fluctuations are anisotropic and weaker compared to underdoped copper-oxides or cobalt-oxide superconductors, while there is no significant electron correlations in LaNiAsO(0.9)F(0.1). We will discuss the implications of these results and highlight the importance of the Fermi surface topology. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/42414]  |
| 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 | Li, Z,Kawasaki, S,Oka, T,et al. Multiple superconducting gap and anisotropic spin fluctuations in iron arsenides: Comparison with nickel analog[J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,2011,72(5):492. |
| APA | Li, Z.,Kawasaki, S.,Oka, T.,Tabuchi, T.,Ooe, Y.,...&Zheng, GQ.(2011).Multiple superconducting gap and anisotropic spin fluctuations in iron arsenides: Comparison with nickel analog.JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,72(5),492. |
| MLA | Li, Z,et al."Multiple superconducting gap and anisotropic spin fluctuations in iron arsenides: Comparison with nickel analog".JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS 72.5(2011):492. |
入库方式： OAI收割
来源：物理研究所
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