A clear correlation between the A-site cation size and the octahedral tilt propagation from the substrates into the ATiO3 (A = Ba2+, Sr2+, Sr2+0.7Ca2+0.3, and Sr2+0.5Ca2+0.5) epitaxial thin films was found from the observations of ATiO3/GdScO3 heterostructures using high-resolution annular bright-field scanning transmission electron microscopy. The in-plane oxygen displacements at the interface increase with decreasing the A-site cation size and facilitate the TiO6 octahedral tilt propagation across the interface. The results highlight the significance of the A-site cation size as a controlling factor for structural distortions at oxide-based heterointerfaces.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics