Anisotropic superconductivity and unusually robust electronic critical field in single crystal La${}_7$Ir${}_3$

D. A. Mayoh, S. J. R. Holt, T. Takabatake +2

Polycrystalline La${}_7$Ir${}_3$ is reported to show superconductivity breaking time-reversal symmetry while also having an isotropic $s$-wave gap. Single crystals of this noncentr…