NiO6-octahedral tilts in ultrathin LaNiO3 films were studied using position averaged convergent beam electron diffraction (PACBED) in scanning transmission electron microscopy. Both the type and magnitude of the octahedral tilts were determined by comparing PACBED experiments to frozen phonon multislice simulations. It is shown that the out-of-plane octahedral tilt of an epitaxial film under biaxial tensile stress (0.78 % in-plane tensile strain) increases by ~ 20%, while the in-plane rotation decreases by ~ 80%, compared to the unstrained bulk material.
@article{arxiv.1204.5982,
title = {Nanoscale Quantification of Octahedral Tilts in Perovskite Films},
author = {Jinwoo Hwang and Jack Y. Zhang and Junwoo Son and Susanne Stemmer},
journal= {arXiv preprint arXiv:1204.5982},
year = {2015}
}
Comments
The manuscript has been accepted by Applied Physics Letters. After it is published, it will be found at: http://apl.aip.org/