BaTiO3 is frequently considered a model ferroelectric material whose dielectric properties are primarily determined by a Ti ion shifts with respect to surrounding oxygen octahedra. In spite of decades of dedicated research, a lot remains to be clarified in this field. For example, a clear and convincing description of the collective Ti ion dynamics is mising until now. We decided to study this problem using “nanoscopic” X-ray diffraction methods and atomistic simulations; by combining the methods, we have managed to demonstrate that the titanium ion dynamics may exhaustively be described in terms phonons, excited at picosecond timescales.
- Research School of Chemistry, Australian National University, Australia
- Institut Laue-Langevin, France
Contact person: Marek Paściak