Spin-singlet superconductivity with multiple gaps in PrFeAsO 0.89F0.11

K. Matano; Z. A. Ren; X. L. Dong; L. L. Sun; Z. X. Zhao; Guo Qing Zheng

doi:10.1209/0295-5075/83/57001

Spin-singlet superconductivity with multiple gaps in PrFeAsO _0.89F_0.11

K. Matano, Z. A. Ren, X. L. Dong, L. L. Sun, Z. X. Zhao, Guo Qing Zheng

Research output: Contribution to journal › Article › peer-review

206 Citations (Scopus)

Abstract

We report ⁷⁵As and ¹⁹F NMR studies on the superconducting properties of the newly discovered compound PrFeAsO _0.89F_0.11 (T_c=45 K). The Knight shift in the direction of H∥ab-plane decreases below T_c 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 T_c, with nodes in the gap function.

Original language	English
Article number	57001
Journal	EPL
Volume	83
Issue number	5
DOIs	https://doi.org/10.1209/0295-5075/83/57001
Publication status	Published - Sep 1 2008

ASJC Scopus subject areas

Physics and Astronomy(all)

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AU - Zhao, Z. X.

AU - Zheng, Guo Qing

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AB - We report 75As and 19F NMR studies on the superconducting properties of the newly discovered compound PrFeAsO 0.89F0.11 (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.

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Spin-singlet superconductivity with multiple gaps in PrFeAsO _0.89F_0.11

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