Spin-singlet superconductivity with multiple gaps in PrFeAsO0.89F0.11

Spin-singlet superconductivity with multiple gaps in PrFeAsO0.89F0.11
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DOI:
10.1209/0295-5075/83/57001
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发表时间:
2008-06
期刊:
EPL (Europhysics Letters)
影响因子:
--
通讯作者:
K. Matano;Z. Ren;Xiaoli Dong;Lei Sun;Zhao Zhao-Zhao;G. Zheng
K. Matano;Z. Ren;Xiaoli Dong;Lei Sun;Zhao Zhao-Zhao;G. Zheng
中科院分区:
其他
文献类型:
--
作者:
K. Matano;Z. Ren;Xiaoli Dong;Lei Sun;Zhao Zhao-Zhao;G. Zheng

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我们报告了新发现的化合物 PrFeAsO0.89F0.11 (Tc=45 K) 超导特性的 75As 和 19F NMR 研究。 H∥ab 平面方向的奈特位移在 Tc 以下减小到几乎为零,这表明自旋单线配对。奈特位移和自旋晶格弛豫率的温度依赖性表明,在 Tc 以下存在两个能隙,其节点位于能隙函数中。
We report 75As and 19F NMR studies on the superconducting properties of the newly discovered compound PrFeAsO0.89F0.11 (Tc=45 K). The Knight shift in the direction of H∥ab-plane decreases below Tc to almost zero, which indicates spin-singlet pairing. The temperature dependencies of both the Knight shift and the spin lattice relaxation rate indicate that there are two gaps opening below Tc, with nodes in the gap function.