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Sophia G, Baranek P, Rérat M, Dovesi R. The effect of composition on phonon softening in ABO 3-type perovskites: DFT modelling. Phys Chem Chem Phys 2022; 24:27064-27074. [DOI: 10.1039/d2cp03003a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The influence of the A cation on the ferroelectric instability in ABO3 perovskites, and its associated F1u IR-active phonon mode, is systematically investigated for tantalates, niobates and titanates at the hybrid density-functional theory level.
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Affiliation(s)
- Gustavo Sophia
- EDF R&D – Department MMC, EDF Lab Les Renardières, Avenue des Renardières, F-77818 Moret-sur-Loing Cedex, France
| | - Philippe Baranek
- EDF R&D – Department SYSTEME, EDF Lab Paris–Saclay, 7 boulevard Gaspard Monge, F-91120 Palaiseau, France
- Institut Photovoltaïque d’Ile-de-France (IPVF), 18 boulevard Thomas Gobert, F-91120 Palaiseau, France
| | - Michel Rérat
- Université de Pau et des Pays de l’Adour, E2S UPPA, CNRS, IPREM, 2 avenue du Président Pierre Angot, F-64053 Pau, France
| | - Roberto Dovesi
- Theoretical Chemistry Group – University of Turin, Dipartimento di Chimica IFM, Via Giuria 5, I-10125 Torino, Italy
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