Evidence for a full energy gap in the nickel pnictide superconductor LaNiAsO1-xFx from As-75 nuclear quadrupole resonance
文献类型：期刊论文
| 作者 | Tabuchi, T ; Li, Z ; Oka, T ; Chen, GF ; Kawasaki, S ; Luo, JL ; Wang, NL ; Zheng, GQ |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2010 |
| 卷号 | 81期号:14 |
| 关键词 | SPIN INSTABILITY |
| ISSN号 | 1098-0121 |
| 通讯作者 | Tabuchi, T: Okayama Univ, Dept Phys, Okayama 7008530, Japan. |
| 中文摘要 | We report systematic As-75-NQR and La-139-NMR studies on nickel pnictide superconductors LaNiAsO1-xFx (x=0, 0.06, 0.10, and 0.12). The spin-lattice relaxation rate 1/T-1 decreases below T-c with a well-defined coherence peak and follows an exponential decay at low temperatures. This result indicates that the superconducting gap is fully opened and is strikingly different from that observed in iron-pnictide analogs. In the normal state, 1/T1T is constant in the temperature range T-c similar to 4 K < T < 10 K for all compounds and up to T=250 K for x=0 and 0.06, which indicates weak electron correlations and is also different from the iron analog. We argue that the differences between the iron and nickel pnictides arise from the different electronic band structure. Our results highlight the importance of the peculiar Fermi-surface topology in iron pnictides. We also provide a possible interpretation for the "pseudogap-like" behavior in the normal state which is also seen in iron pnictides. |
| 收录类别 | SCI |
| 资助信息 | JSPS; MEXT [17052005, 20244058]; NSF of China |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/37599]  |
| 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 | Tabuchi, T,Li, Z,Oka, T,et al. Evidence for a full energy gap in the nickel pnictide superconductor LaNiAsO1-xFx from As-75 nuclear quadrupole resonance[J]. PHYSICAL REVIEW B,2010,81(14). |
| APA | Tabuchi, T.,Li, Z.,Oka, T.,Chen, GF.,Kawasaki, S.,...&Zheng, GQ.(2010).Evidence for a full energy gap in the nickel pnictide superconductor LaNiAsO1-xFx from As-75 nuclear quadrupole resonance.PHYSICAL REVIEW B,81(14). |
| MLA | Tabuchi, T,et al."Evidence for a full energy gap in the nickel pnictide superconductor LaNiAsO1-xFx from As-75 nuclear quadrupole resonance".PHYSICAL REVIEW B 81.14(2010). |
入库方式： OAI收割
来源：物理研究所
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