Annual Meeting of the Swiss Physical Society 2022

【125】Possible p-wave parity in newly found superconductor Pr3Cr10−xN11

29 Jun 2022, 15:45

15m

Room JD 002

Talk Condensed Matter Physics (KOND) Condensed Matter Physics

Speaker

Changsheng Chen (UZH)

Description

Superconductivity with a critical temperature $T_C$ $\sim$ 5.25 K was recently reported in the Cr-based superconductor Pr${}_3$Cr${}_{10-x}$N${}_{11}$. The large upper critical field $H_{C2}$ $\sim$ 20 T, and the strong correlation between 3$d$ electrons derived from specific heat, suggest the unconventional superconductivity nature of this compound. We performed muon-spin rotation/relaxation ($\mu$SR) measurements on a high-quality polycrystalline of Pr${}_3$Cr${}_{10-x}$N${}_{11}$ down to 0.027 K, and specific heat measurements under different magnetic fields up to 9 Tesla. Our $\mu$SR data indicate that time-reversal symmetry is broken in the superconducting state of Pr${}_3$Cr${}_{10-x}$N${}_{11}$, and the superconducting energy gap is consistent with a $p$-wave model, which is also supported by the specific heat data.