Structure and chemical states of highly eptiaxial CeO2(001) films grown on SrTiO3 substrate by laser molecular beam epitaxy

(a) High resolution bright field TEM image for CeO2/ STO interface; (b) corresponding selected area electron diffraction patterns, red circles highlight the diffraction pattern of the CeO2 film; (c) Schematic diagram of the theoretical epitaxial relationship between the cubic cells of STO substrate and CeO2 film