Two superconducting gaps in LaFeAsO0.92F0.08 revealed by As-75 nuclear quadrupole resonance
文献类型：期刊论文
| 作者 | Kawasaki, S ; Shimada, K ; Chen, GF ; Luo, JL ; Wang, NL ; Zheng, GQ |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2008 |
| 卷号 | 78期号:22 |
| 关键词 | LAYERED QUATERNARY COMPOUND NQR NMR |
| ISSN号 | 1098-0121 |
| 通讯作者 | Kawasaki, S (reprint author), Okayama Univ, Dept Phys, Okayama 7008530, Japan. |
| 中文摘要 | We report As-75 nuclear quadrupole resonance studies on superconducting oxypnictide LaFeAsO0.92F0.08 (T-c=23 K). The temperature dependence of the spin-lattice relaxation rate (1/T-1) decreases below T-c without a coherence (Hebel-Slichter) peak and shows a temperature dependence that is not simple power law nor exponential. We show that the result can be understood in terms of two superconducting gaps of either d- or +/- s-wave symmetry, with the larger gap Delta(1)similar to 4k(B)T(c) and the smaller one Delta(2)similar to 1.5k(B)T(c). Our result suggests that the multiple-gap feature is universal in the oxypnictide superconductors, which is probably associated with the multiple electronic band structures in this class of materials. We also find that 1/T1T above T-c increases with decreasing temperature, which suggests weak magnetic fluctuations in the normal state. |
| 收录类别 | SCI |
| 资助信息 | MEXT; JSPS, Japan; NSF of China; ITSNEM program of CAS |
| 语种 | 英语 |
| 公开日期 | 2013-09-23 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/46244]  |
| 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 | Kawasaki, S,Shimada, K,Chen, GF,et al. Two superconducting gaps in LaFeAsO0.92F0.08 revealed by As-75 nuclear quadrupole resonance[J]. PHYSICAL REVIEW B,2008,78(22). |
| APA | Kawasaki, S,Shimada, K,Chen, GF,Luo, JL,Wang, NL,&Zheng, GQ.(2008).Two superconducting gaps in LaFeAsO0.92F0.08 revealed by As-75 nuclear quadrupole resonance.PHYSICAL REVIEW B,78(22). |
| MLA | Kawasaki, S,et al."Two superconducting gaps in LaFeAsO0.92F0.08 revealed by As-75 nuclear quadrupole resonance".PHYSICAL REVIEW B 78.22(2008). |
入库方式： OAI收割
来源：物理研究所
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