The poisoning effect of Mn in LaFe(1-x)Mn(x)AsO(0.89)F(0.11): unveiling a quantum critical point in the phase diagram of iron-based superconductors

F. Hammerath, P. Bonfá, S. Sanna +5

A superconducting-to-magnetic transition is reported for LaFe${}_{1-x}$Mn${}_x$AsO${}_{0.89}$F${}_{0.11}$ where a per thousand amount of Mn impurities is dispersed. By employing local spec…