Article (Scientific journals)
Electric Field Control of Jahn-Teller Distortions in Bulk Perovskites
Varignon, Julien; Bristowe, Nicholas; Ghosez, Philippe
2016In Physical Review Letters, 116, p. 057602
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Abstract :
[en] 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 Pb21m 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.
Disciplines :
Physics
Author, co-author :
Varignon, Julien ;  Université de Liège > Département de physique > Physique théorique des matériaux
Bristowe, Nicholas ;  Université de Liège > Département de physique > Physique théorique des matériaux
Ghosez, Philippe  ;  Université de Liège > Département de physique > Physique théorique des matériaux
Language :
English
Title :
Electric Field Control of Jahn-Teller Distortions in Bulk Perovskites
Publication date :
2016
Journal title :
Physical Review Letters
ISSN :
0031-9007
eISSN :
1079-7114
Publisher :
American Physical Society, Ridge, United States - New York
Volume :
116
Pages :
057602
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
Tier-1 supercomputer
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
CÉCI - Consortium des Équipements de Calcul Intensif [BE]
Tier-1
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