Anomalous superconducting state in LiFeAs implied by the ${}^{75}$As Knight shift measurement

S. -H. Baek, L. Harnagea, S. Wurmehl +2

${}^{75}$As NMR investigation of a single crystal of superconducting LiFeAs is presented. The Knight shift and the \textit{in situ} ac susceptibility measurements as a function of te…