fig7

Figure 7. (A) ABF STEM image of pristine LSC55 particles with the FFT pattern of the selected region; (B) ABF STEM image of LSC55-F20 particles with the FFT pattern of the selected region; (C) HAADF image of LSC55-F20 particles; (D) F K-edge spectra. This figure is quoted with permission^[80]; (E) Co L_2,3-edge spectra from the numbered regions in (D); (F) Schematic of photoinduced charge transfer at the SRO/STO interface; (G) High-resolution HAADF-STEM image of the SRO/STO interface with ABF-STEM image of the selected region; (H) Schematic representation of VO distribution in SRO; (I) DOS illustration for the SRO_3-δ/STO heterostructure under dark and illuminated conditions. This figure is quoted with permission^[81]; (J) Rietveld refinement of X-ray and neutron powder diffraction data; (K) Structural diagram of BaCoO_2+δ. This figure is quoted with permission^[82]. ABF STEM: Annular bright field scanning transmission electron microscopy; ABF-STEM: annular bright-field scanning transmission electron microscopy; FFT: fast Fourier transform; HAADF-STEM: high-angle annular dark-field scanning transmission electron microscopy; SRO: SrRuO₃; STO: SrTiO₃; VO: oxygen vacancies; DOS: density of states.