Electric Field Control of Jahn-Teller Distortions in Bulk Perovskites

Varignon, Julien and Bristowe, Nicholas C. and Ghosez, Philippe (2016) Electric Field Control of Jahn-Teller Distortions in Bulk Perovskites. Physical Review Letters, 116 (5). ISSN 0031-9007. (doi:https://doi.org/10.1103/PhysRevLett.116.057602) (Full text available)

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http://dx.doi.org/10.1103/PhysRevLett.116.057602

Abstract

The Jahn-Teller distortion, by its very nature, is often at the heart of the various electronic properties displayed by perovskites and related materials. Despite the Jahn-Teller mode being nonpolar, we devise and demonstrate, in the present Letter, an electric field control of Jahn-Teller distortions in bulk perovskites. The electric field control is enabled through an anharmonic lattice mode coupling between the Jahn-Teller distortion and a polar mode. We confirm this coupling and quantify it through first-principles calculations. The coupling will always exist within the Pb2(1)m space group, which is found to be the favored ground state for various perovskites under sufficient tensile epitaxial strain. Intriguingly, the calculations reveal that this mechanism is not only restricted to Jahn-Teller active systems, promising a general route to tune or induce novel electronic functionality in perovskites as a whole.

Item Type: Article
Subjects: Q Science > QC Physics > QC173.45 Condensed Matter
Q Science > QC Physics > QC176 Solid state physics
Q Science > QD Chemistry > QD478 Solid State Chemistry
Q Science > QC Physics > QC176.8.N35 Nanoscience, nanotechnology
Q Science > QD Chemistry > QD473 Physical properties in relation to structure
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Nicholas Bristowe
Date Deposited: 21 Feb 2017 16:50 UTC
Last Modified: 23 Feb 2017 09:43 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/60250 (The current URI for this page, for reference purposes)
Bristowe, Nicholas C.: https://orcid.org/0000-0003-1286-8440
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