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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Giura, Paola
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2021Effect of water incorporation on the ionic conduction properties of the solid electrolyte material RbTiO.(HO)citations
- 2018Ca<sub>2</sub>CuO<sub>2</sub>Cl<sub>2</sub>, a redetermination from single-crystal X-ray diffraction datacitations
- 2017The crystal structure of Rb<sub>2</sub>Ti<sub>2</sub>O<sub>5</sub>citations
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article
The crystal structure of Rb<sub>2</sub>Ti<sub>2</sub>O<sub>5</sub>
Abstract
<jats:p>Recent results have demonstrated an exceptionally high permittivity in the range 200–330 K in crystalline titanium oxide Rb<jats:sub>2</jats:sub>Ti<jats:sub>2</jats:sub>O<jats:sub>5</jats:sub>. In this article, the possibility of a structural transition giving rise to ferroelectricity is carefully inspected. In particular, X-ray diffraction, high-resolution transmission electron microscopy and Raman spectroscopy are performed. The crystal structure is shown to remain invariant and centrosymmetric at all temperatures between 90 K and 450 K. The stability of the <jats:italic>C</jats:italic>2/<jats:italic>m</jats:italic> structure is confirmed by density functional theory calculations. These important findings allow the existence of a conventional ferroelectric phase transition to be ruled out as a possible mechanism for the colossal permittivity and polarization observed in this material.</jats:p>