A new cubic η-carbide superconductor, Ta4Rh2C1−δ, has Tc = 6.4 K and an extrapolated upper critical field of 17.4 T, exceeding the weak-coupling Pauli limit.
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Discovery of the Type-II Superconductor Ta$_4$Rh$_2$C$_{1-\delta}$ with a High Upper Critical Field
A new cubic η-carbide superconductor, Ta4Rh2C1−δ, has Tc = 6.4 K and an extrapolated upper critical field of 17.4 T, exceeding the weak-coupling Pauli limit.