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

doi:10.1103/PhysRevLett.114.117001

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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

DOI 10.1103/PhysRevLett.114.117001 · Physical Review Letters

T1

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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 quasiparticle effective mass near Pc associated with the magnetic quantum fluctuations.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
MnP Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1	7.8 GPa	onset
MnP Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	1	7.6 GPa	onset
CrAs Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown