Article (Scientific journals)
First-principles study of strain-induced Jahn-Teller distortions in BaFeO3
Cherair, I.; Bousquet, Eric; Schmitt, Michaël et al.
2018In Journal of Physics: Condensed Matter, 30 (25)
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Keywords :
BaFeO3 oxide; DFT+U; Jahn-Teller distortions; Barium compounds; Calculations; Density functional theory; Electronic properties; Ground state; Jahn-Teller effect; Oxygen; Perovskite; Strontium compounds; Dft + u; Epitaxial strain; First-principles calculation; First-principles study; Generalized gradient approximations; Magnetic and electronic properties; Octahedral rotations; Tensile biaxial strain; Iron compounds
Abstract :
[en] The effect of epitaxial strain on structural, magnetic and electronic properties of BaFeO3 perovskite oxide are investigated from first principles calculations, using the density functional theory (DFT) plus the Hubbard approach (DFT+U) within the generalized gradient approximation. Hybrid functional calculations, based on mixed exact Hartree-Fock and DFT exchange energy functionals, are also performed. For the ground state calculations, the DFT+U is found more suitable to describe the half metallic and ferromagnetic state of cubic BaFeO3. Jahn-Teller distortions, oxygen octahedra rotations and charge orderings in BaFeO3 under biaxial strain are explored. The obtained results reveal that structural changes associated with Jahn-Teller distortions are induced under tensile biaxial strain while the oxygen octahedra rotations and breathing are unusually not observed. Then, the strained BaFeO3 is considered as a particular Jahn-Teller distorted perovskite with exceptional properties when compared to CaFeO3 and SrFeO3. These findings lead to a strain engineering of the JT distortions in BaFeO3, and thus for high fundamental and technological interests. © 2018 IOP Publishing Ltd.
Disciplines :
Physics
Author, co-author :
Cherair, I.;  Theoretical Physics Laboratory, Faculty of Physics, USTHB, BP 32 El Alia, Bab Ezzouar, Algiers, Algeria, Faculty of Technology, University of Médea, Médea, Algeria
Bousquet, Eric  ;  Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Schmitt, Michaël ;  Université de Liège - ULiège > Département de physique > Physique théorique des matériaux
Iles, N.;  Laboratory of Thin Films Physics and Materials for Electronics, Oran 1 University, Oran, Algeria
Kellou, A.;  Theoretical Physics Laboratory, Faculty of Physics, USTHB, BP 32 El Alia, Bab Ezzouar, Algiers, Algeria
Language :
English
Title :
First-principles study of strain-induced Jahn-Teller distortions in BaFeO3
Publication date :
2018
Journal title :
Journal of Physics: Condensed Matter
ISSN :
0953-8984
eISSN :
1361-648X
Publisher :
Institute of Physics Publishing
Volume :
30
Issue :
25
Peer reviewed :
Peer Reviewed verified by ORBi
Tags :
Tier-1 supercomputer
CÉCI : Consortium des Équipements de Calcul Intensif
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Funding text :
CECI F.R.S.-FNRS (Grant No. 2.5020.1) and Tier-1 Fédération Wallonie-Bruxelles funded by the Walloon Region (Grant No. 1117545)
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