Superconducting and normal-state properties of single-crystalline Tl0.47Rb0.34Fe1.63Se2 as seen via Se-77 and Rb-87 NMR
文献类型：期刊论文
| 作者 | Ma, L ; Ji, GF ; Zhang, J ; He, JB ; Wang, DM ; Chen, GF ; Bao, W ; Yu, WQ |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 83期号:17 |
| 关键词 | RESOLVED PHOTOEMISSION-SPECTROSCOPY GAPS CS |
| ISSN号 | 1098-0121 |
| 通讯作者 | Ma, L (reprint author), Renmin Univ China, Dept Phys, Beijing 100872, Peoples R China. |
| 中文摘要 | We report both Se-77 and Rb-87 nuclear magnetic resonance (NMR) studies on Tl0.47Rb0.34Fe1.63Se2 single-crystalline superconductors (T-c approximate to 32 K). Singlet superconductivity is suggested by a sharp drop of the Knight shift K(T) below T-c, after subtracting the superconducting diamagnetic effect. However, the Hebel-Slichter coherence peak below T-c is not observed in the spin-lattice relaxation rate 1/T-1, even with a low in-plane NMR field of 2.6 T. Just above T-c, no evidence of low-energy spin fluctuation is found in the spin-lattice relaxation rate on both the Se-77 and the Rb-87 sites. Upon warming, however, the Knight shifts and the spin-lattice relaxation rates of both nuclei increase substantially with temperature. In particular, the Knight shift is nearly isotropic and follow a function fit of K = a + bT(2) from T-c up to 300 K. Our observations should put a strong constraint to the theory of magnetism and superconductivity in the recently discovered iron selenide superconductors. |
| 收录类别 | SCI |
| 资助信息 | NSFC [10974254, 11034012, 11074304]; National Basic Research Program of China [2010CB923000, 2011CBA00100]; Program for New Century Excellent Talents in University; Fundamental Research Funds for the Central Universities |
| 语种 | 英语 |
| 公开日期 | 2014-02-20 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/57809]  |
| 专题 | 物理研究所_所内人员在其他单位发表论文题录信息_所内人员在其他单位发表论文题录信息_期刊论文 |
| 推荐引用方式 GB/T 7714 | Ma, L,Ji, GF,Zhang, J,et al. Superconducting and normal-state properties of single-crystalline Tl0.47Rb0.34Fe1.63Se2 as seen via Se-77 and Rb-87 NMR[J]. PHYSICAL REVIEW B,2011,83(17). |
| APA | Ma, L.,Ji, GF.,Zhang, J.,He, JB.,Wang, DM.,...&Yu, WQ.(2011).Superconducting and normal-state properties of single-crystalline Tl0.47Rb0.34Fe1.63Se2 as seen via Se-77 and Rb-87 NMR.PHYSICAL REVIEW B,83(17). |
| MLA | Ma, L,et al."Superconducting and normal-state properties of single-crystalline Tl0.47Rb0.34Fe1.63Se2 as seen via Se-77 and Rb-87 NMR".PHYSICAL REVIEW B 83.17(2011). |
入库方式： OAI收割
来源：物理研究所
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