Journal article
Recipes for improper ferroelectricity in molecular perovskites
- Abstract:
- 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 enhancement of the number of improper ferroelectric coupling schemes available to molecular perovskites. This enhancement arises because molecular substitution diversifies the range of distortions possible. Not only do our insights rationalise the emergence of polarisation in previously studied materials, but we identify the fundamental importance of molecular degrees of freedom that are straightforwardly controlled from a synthetic viewpoint. We envisage that the crystal design principles we develop here will enable targeted synthesis of a large family of new acentric functional materials.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 1.3MB, Terms of use)
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- Publisher copy:
- 10.1038/s41467-018-04764-x
Authors
- Publisher:
- Nature Publishing Group
- Journal:
- Nature Communications More from this journal
- Volume:
- 9
- Issue:
- 1
- Pages:
- 2380
- Publication date:
- 2018-06-18
- Acceptance date:
- 2018-05-22
- DOI:
- EISSN:
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2041-1723
- Pmid:
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29915202
- Language:
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English
- Keywords:
- Pubs id:
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pubs:859472
- UUID:
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uuid:dfa1c723-ec31-45d5-8d68-8bdbec898850
- Local pid:
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pubs:859472
- Source identifiers:
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859472
- Deposit date:
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2018-07-04
- ARK identifier:
Terms of use
- Copyright holder:
- Boström et al
- Copyright date:
- 2018
- Notes:
- © The Author(s) 2018. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
- Licence:
- CC Attribution (CC BY)
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