Fig. 1: LEED patterns before and after the adsorption of OLAC.

a Line scans along reciprocal K direction to monitor the SCV reconstruction and the CTR signal on magnetite (001) before (blue) and after OLAC adsorption (red). Inset: LEED patterns (electron energy 68 eV) show the SCV reconstructed surface (blue circle) and after OLAC adsorption (red circle). b LEED patterns of the clean magnetite (111) surface obtained at 125 eV (blue circle) and after OLAC adsorption (red circle). The reciprocal unit cell is indicated by a white rhombus.