Effect of hybridization on structural and magnetic properties of iron-based superconductors

Abstract

We show that the strong hybridization between the iron 3d and the arsenic 4p\norbitals, in the newly discovered iron-based high-T$_{c}$ superconductors,\nleads to an explanation of certain experimental observations that are presently\nnot well understood. The existence of a lattice distortion, the smallness of\nthe Fe magnetic moment in the undoped systems, and the suppression of both the\nlattice distortion and the magnetic order upon doping with fluorine, are all\nshown to result from this hybridization.\n