Theory of Andreev reflection in junctions with iron-based high-T-c superconductors

We construct a theory for low-energy quantum transport in normal parallel to superconductor junctions involving the recently discovered iron-based high-T-c superconductors. We properly take into account both Andreev bound surface states and the complex Fermi-surface topology in our approach and investigate the signatures of the possible order-parameter symmetries for the FeAs lattice. Our results could be helpful in determining the symmetry of the superconducting state in the iron-pnicitide superconductors.