Band Structure of New ReFeAsO Superconductors

Abstract

We investigate the band structure of Fe-based superconductors using the first-principle method of density-functional theory. We calculated the band structure and the density of states at the Fermi level for ReFeAsO (Re = Sm, Er) superconductors. Our calculations indicate that the maximum critical superconducting transition temperature T c will be observed for compounds with Sm and Er at 55 and 46 K, respectively.