Article (Scientific journals)
Bi2W2O9: A potentially antiferroelectric Aurivillius phase
Djani-Ait, Hania; McCabe, Emma; Zhang, W. et al.
2020In Physical Review. B, 101, p. 134113
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Keywords :
antiferroelectric; Aurivillius
Abstract :
[en] Ferroelectric tungsten-based Aurivillius oxides are naturally stable superlattice structures, in which A-site deficient perovskite blocks [Wn O3n+1 ]−2 (n = 1, 2, 3, . . . ) interleave with fluorite-like bismuth oxide layers [Bi2O2]+2 along the c-axis. In the n = 2 Bi2W2O9 phase, an in-plane antipolar distortion dominates but there has been controversy as to the ground-state symmetry. Here we show, using a combination of first-principles density functional theory calculations and experiments, that the ground state is a nonpolar phase of Pnab symmetry. We explore the energetics of metastable phases and the potential for antiferroelectricity in this n = 2 Aurivillius phase.
Research center :
Physique Théorique des Matériaux
Disciplines :
Physics
Author, co-author :
Djani-Ait, Hania ;  Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
McCabe, Emma;  University of Kent > School of Physical Sciences
Zhang, W.;  University of Houston > Department of Chemistry,
Halasyamani, P. S.;  University of Houston > Department of Chemistry
Feteira, A.;  Sheffield Hallam University
Bieder, Jordan ;  Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Bousquet, Eric  ;  Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Ghosez, Philippe  ;  Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Language :
English
Title :
Bi2W2O9: A potentially antiferroelectric Aurivillius phase
Publication date :
2020
Journal title :
Physical Review. B
ISSN :
2469-9950
eISSN :
2469-9969
Publisher :
American Physical Society
Volume :
101
Pages :
134113
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
CÉCI : Consortium des Équipements de Calcul Intensif
Tier-1 supercomputer
Funders :
Computational resources are provided by the Consortium des Equipements de Calcul Intensif (CECI), funded by the F.R.S.-FNRS under Grant No. 2.5020.11 and the Tier-1 super- computer of the Fédération Wallonie-Bruxelles funded by the Walloon Region under Grant No 1117545
CÉCI - Consortium des Équipements de Calcul Intensif [BE]
Tier-1
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since 08 July 2020

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