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:
影响因子:
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通讯作者:
K. Matano;Z. Ren;Xiaoli Dong;Lei Sun;Zhao Zhao-Zhao;G. Zheng
中科院分区:
文献类型:
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作者:
K. Matano;Z. Ren;Xiaoli Dong;Lei Sun;Zhao Zhao-Zhao;G. Zheng
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.