Local spectroscopic evidence for a nodeless magnetic kagome superconductor CeRu_2

We report muon spin rotation ({\mu}SR) experiments on the microscopic properties of superconductivity and magnetism in the kagome superconductor CeRu_{2} with T_{\rm c}~{\simeq}~5~K. From the measurements of the temperature-dependent magnetic penetration depth {\lambda}, the superconducting order parameter exhibits nodeless pairing, which fits best to an anisotropic s-wave gap symmetry. We further show that the $T_{\rm c}/\lambda^{-2}$... Show more