Superconducting gap and pseudogap in the surface states of the iron-based superconductor PrFeAsO${}_{1-y}$ studied by angle-resolved photoemission spectroscopy

K. Hagiwara, M. Ishikado, M. Horio +12

In order to study the possible superconductivity at the polar surfaces of 1111-type iron-based superconductors, which is doped with a large amount of holes in spite of the electron…