Isotropic superconductivity in LaRu2P2 with the ThCr2Si2-type structure

The anisotropic superconducting properties of the LaRu2P2 single crystal have been systematically investigated by magnetic and transport measurements. Both the upper critical field (Hc2) and the lower critical field (Hc1) show isotropic behavior, indicating the three-dimensional nature of its Fermi surface topology. This behavior is very much like that observed in iron-based superconductors. Weak vortex pinning was observed through magnetic measurement. The penetration depth and coherent length were estimated from upper and lower critical fields at zero temperature. The negative Hall coefficient indicates that the carrier is electron-type. The carrier density is about one order of magnitude larger than that of electron-doped iron-based superconductors.

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