Fig. 1: Interfacial atomic structure of a-Se capped 1.5uc FeSe/LFO/STO.
From: High temperature superconductivity at FeSe/LaFeO3 interface
a High-angle annular dark field (HAADF) image of amorphous Se capped 1.5uc FeSe/LFO/STO along the [100] direction of the STO lattice. b Element-resolved maps based on the EELS data at Sr-L2,3, Ti-L2,3, La-M4,5, Fe-L2,3, and Se-L2,3 absorption edges. The region is shown by the red rectangle in panel a. FeSe layer that is atomically resolved in HAADF-STEM loses atomic resolution in element maps due to the dose damage from the much more intense electron beam used during element maps. c Zoomed-in HAADF image near the FeSe/LFO interface, and the side view of the atomic structure is illustrated. The region is shown by the orange rectangle in panel a, d Same as panel c, but along [110] direction of the STO lattice. e Illustration of the resolved interfacial atomic structure at FeSe/LFO interface (see Supplementary Note 2 for some details on analysis).
