Pressure induced superconductivity on the border of magnetic order in MnP.
Phys Rev Lett
; 114(11): 117001, 2015 Mar 20.
Article
em En
| MEDLINE
| ID: mdl-25839302
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 T(sc)≈1 K emerges and exists merely near the critical pressure P(c)≈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 P(c) associated with the magnetic quantum fluctuations.
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MEDLINE
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En
Ano de publicação:
2015
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Article