Simultaneous Evidence for Pauli Paramagnetic Effects and Multiband Superconductivity in KFe${}_2$As${}_2$ by Small-Angle Neutron Scattering Studies of the Vortex Lattice

S. J. Kuhn, H. Kawano-Furukawa, E. Jellyman +11

We study the intrinsic anisotropy of the superconducting state in KFe${}_2$As${}_2$, using small-angle neutron scattering to image the vortex lattice as the applied magnetic field is r…