Figure 3: Band dispersion of the α band at kz=0 and π in LiFe0.97Co0.03As.
From: Observation of strong electron pairing on bands without Fermi surfaces in LiFe1−xCoxAs
(a,c) show the ARPES intensity plots of LiFe0.97Co0.03As at 51 eV (kz=0) and 35 eV (kz=π), respectively. The data are recorded at 20 K with linearly polarized light to enhance the α band11,17. Blue and red circles on top of the intensity are extracted from EMDCs. (b,d) are the same data but divided by the FD function convoluted with the system resolution. (e) The extracted band dispersions from a,c are plotted together and prove that the band top of the α band has tiny dispersion along kz. (f) The EDCs at the Brillouin zone centre as marked by the red dashed line in b,d. Red and yellow curves are the same data of blue and cyan curves but divided by the FD function convoluted with the system resolution.
