Recipes for improper ferroelectricity in molecular perovskites

@inproceedings{Bostrm2018RecipesFI,
  title={Recipes for improper ferroelectricity in molecular perovskites},
  author={Hanna L B Bostr{\"o}m and Mark S Senn and Andrew L Goodwin},
  booktitle={Nature Communications},
  year={2018}
}
The central goal of crystal engineering is to control material function via rational design of structure. A particularly successful realisation of this paradigm is hybrid improper ferroelectricity in layered perovskite materials, where layering and cooperative octahedral tilts combine to break inversion symmetry. However, in the parent family of inorganic ABX3 perovskites, symmetry prevents hybrid coupling to polar distortions. Here, we use group-theoretical analysis to uncover a profound… CONTINUE READING
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