Nodeless energy gaps of single-crystalline Ba0.68K0.32Fe2As2 as seen via As-75 NMR
文献类型：期刊论文
| 作者 | Li, Z ; Sun, DL ; Lin, CT ; Su, YH ; Hu, JP ; Zheng, GQ |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 83期号:14 |
| 关键词 | SUPERCONDUCTING GAPS SPIN RELAXATION METALS |
| ISSN号 | 1098-0121 |
| 通讯作者 | Li, Z (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | We report As-75 nuclear magnetic resonance studies on a very clean hole-doped single-crystal Ba0.68K0.32Fe2As2 (T-c = 38.5 K). The spin-lattice relaxation rate 1/T-1 shows an exponential decrease below T similar or equal to 0.45T(c) down to T similar or equal to 0.11T(c), which indicates a fully opened energy gap. From the ratio (T-1)(c)/(T-1)(a), where a and c denote the crystal directions, we find that the antiferromagnetic spin fluctuation is anisotropic in the spin space above T-c. The anisotropy decreases below T-c and disappears at T -> 0. We argue that the anisotropy stems from spin-orbit coupling whose effect vanishes when spin-singlet electron pairs form with a nodeless gap. |
| 收录类别 | SCI |
| 资助信息 | JSPS; MEXT; NSFC [10974167]; CAS |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/49928]  |
| 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,Sun, DL,Lin, CT,et al. Nodeless energy gaps of single-crystalline Ba0.68K0.32Fe2As2 as seen via As-75 NMR[J]. PHYSICAL REVIEW B,2011,83(14). |
| APA | Li, Z,Sun, DL,Lin, CT,Su, YH,Hu, JP,&Zheng, GQ.(2011).Nodeless energy gaps of single-crystalline Ba0.68K0.32Fe2As2 as seen via As-75 NMR.PHYSICAL REVIEW B,83(14). |
| MLA | Li, Z,et al."Nodeless energy gaps of single-crystalline Ba0.68K0.32Fe2As2 as seen via As-75 NMR".PHYSICAL REVIEW B 83.14(2011). |
入库方式： OAI收割
来源：物理研究所
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