Analysis of the London penetration depth in Ni-doped CaKFe4As4

D. Torsello, K. Cho, K. R. Joshi +10

We report combined experimental and theoretical analysis of superconductivity in CaK(Fe${}_{1-x}$Ni${}_x$)${}_4$As${}_4$ (CaK1144) for $x=$0, 0.017 and 0.034. To obtain the superfluid dens…