Article (Scientific journals)
Coupling and electrical control of structural, orbital and magnetic orders in perovskites
Varignon, Julien; Bristowe, Nicholas; Bousquet, Eric et al.
2015In Scientific Reports, 5, p. 15364
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Abstract :
[en] Perovskite oxides are already widely used in industry and have huge potential for novel device applications thanks to the rich physical behaviour displayed in these materials. The key to the functional electronic properties exhibited by perovskites is often the so-called Jahn-Teller distortion. For applications, an electrical control of the Jahn-Teller distortions, which is so far out of reach, would therefore be highly desirable. Based on universal symmetry arguments, we determine new lattice mode couplings that can provide exactly this paradigm, and exemplify the effect from firstprinciples calculations. The proposed mechanism is completely general, however for illustrative purposes, we demonstrate the concept on vanadium based perovskites where we reveal an unprecedented orbital ordering and Jahn-Teller induced ferroelectricity. Thanks to the intimate coupling between Jahn-Teller distortions and electronic degrees of freedom, the electric field control of Jahn-Teller distortions is of general relevance and may find broad interest in various functional devices.
Research center :
PhyTheMa
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
Bousquet, Eric  ;  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 :
Coupling and electrical control of structural, orbital and magnetic orders in perovskites
Publication date :
20 October 2015
Journal title :
Scientific Reports
eISSN :
2045-2322
Publisher :
Nature Publishing Group, London, United Kingdom
Volume :
5
Pages :
15364
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
Tier-1 supercomputer
CÉCI : Consortium des Équipements de Calcul Intensif
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