Special CPM Seminar

Electronic band structure and superconducting gaps in Fe-based superconductors

Pierre Richard

Beijing National Laboratory for Condensed Matter Physics

The amplitude and symmetry of the superconducting order parameter are intimately related to the pairing mechanism leading to unconventional high-temperature superconductivity in the Fe-based superconductors. Angle-resolved photoemission spectroscopy (ARPES) provides a direct characterization of the superconducting gap in the momentum space. Here I present ARPES results on ferropnictide and ferrochalcogenide superconductors suggesting that the pairing mechanism is not driven by the Fermi surface, but is rather consistent with short-range interactions. In addition, I discuss the role of the electronic correlations in these materials.