Evidence for s-wave superconductivity with antiferromagnetic fluctuations in filled skutterudite LaFe${}_4$P${}_{12}$: ${}^{139}$La and ${}^{31}$P-NMR studies

Y. Nakai, K. Ishida, D. Kikuchi +2

We have performed ${}^{139}$La,${}^{31}$P-NMR studies on a filled skutterudite superconductor LaFe${}_4$P${}_{12}$ with a critical temperature $T_c=4.1$ K. In the normal state, the prese…