Fig. 1: The atomic structure of the FeSe/SrTiO3 interface.
From: Atomic-scale observation of localized phonons at FeSe/SrTiO3 interface
a A high-angle annular dark-field (HAADF) image of FeSe/SrTiO3 interface from [100] zone axis. The purple and orange arrows indicate the bottom Ti–O(B) and top Ti–O(T) layers, respectively. b The core-loss of Fe–L2,3 edge (upper panel) and Ti–L2,3 edge (lower panel) across the interface. c The simulated HAADF image and overlaid atomistic model. The red arrows in a and c point to the extra atom contrast between the ordinary top Ti–O column.
