AUTHOR=Abarca Morales Edgar 

TITLE=The 4-Octahedra model

JOURNAL=Frontiers in Materials

VOLUME=Volume 11 - 2024

YEAR=2024

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2024.1461579

DOI=10.3389/fmats.2024.1461579

ISSN=2296-8016

ABSTRACT=This work comprises a generalisation of a simple geometric model devel-
oped to describe coupled rotations of corner-sharing octahedra in the surface
layer of Sr2RuO4 under uniaxial compression [1]. The main objective of the
model is to establish a link between the experimental, global strain configu-
ration, and the possible microscopic mechanisms and compatible geometries
by which the octahedra accommodate the applied strain. In achieving this,
a useful and intuitive parametrisation of 4-site two-dimensional systems of
corner-sharing octahedra has been established, which can be readily extended
to three-dimensions and N > 4 inequivalent sites, or directly employed to anal-
yse the octahedral configuration of many perovskites, transition metal oxides
and layered compounds.