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arXiv · 1412.7883

Pressure induced superconductivity on the border of magnetic order in MnP

J. -G. Cheng·K. Matsubayashi·W. Wu·J. P. Sun·F. K. Lin·J. L. Luo·Y. Uwatoko
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Abstract

We report the discovery of superconductivity on the border of long-range magnetic order in the itinerant-electron helimagnet MnP via the application of high pressure. Superconductivity with Tsc~1 K emerges and exists merely near the critical pressure Pc~8 GPa, where the long-range magnetic order just vanishes. The present finding makes MnP the first Mn-based superconductor. The close proximity of superconductivity to a magnetic instability suggests an unconventional pairing mechanism. Moreover, the detailed analysis of the normal-state transport properties evidenced non-Fermi-liquid behavior and the dramatic enhancement of the quasi-particle effective mass near Pc associated with the magnetic quantum fluctuations.

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J. -G. Cheng, K. Matsubayashi, W. Wu, J. P. Sun, F. K. Lin, J. L. Luo, Y. Uwatoko. 2014-12-26. Pressure induced superconductivity on the border of magnetic order in MnP. https://doi.org/10.1103/physrevlett.114.117001

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