Microwave Surface-Impedance Measurements of the Magnetic Penetration Depth in Single Crystal Ba1-xKxFe2As2 Superconductors: Evidence for a Disorder-Dependent Superfluid Density

K. Hashimoto, T. Shibauchi, S. Kasahara +10

We report high-sensitivity microwave measurements of the in-plane penetration depth ${\lambda }_{ab}$ and quasiparticle scattering rate $1/\tau$ in several single crystals of hole-doped Fe-bas…