Fermi surface and electronic structure in iron-based superconductors from Angle-Resolved Photoemission Spectroscopy

We will report our high resolution Angle-Resolved Photoemission measurements on iron-based superconductors. Multiple Fermi pockets are well resolved around the $\Gamma $(0, 0) and M($\pi $, $\pi )$ point. In addition, detailed temperature dependent electronic structures will be shown both above and below magnetic/structural transition (T$_{MS})$.