Observation of Multi-Gap Superconductivity in GdO(F)FeAs by Andreev Spectroscopy

T. E. Shanygina, Ya. G. Ponomarev, S. A. Kuzmichev +9

We have studied current-voltage characteristics of Andreev contacts in polycrystalline GdO${}_{0.88}$F${}_{0.12}$FeAs samples with bulk critical temperature $T_c$ = (52.5 \pm 1)K usi…