Open AccessThe intricate lattice dynamics of perovskite oxides
Author(s) -
A. BussmannHolder,
JaeHyeon Ko,
Krystian Roleder
Publication year - 2021
Publication title -
materials and devices
Language(s) - English
Resource type - Journals
ISSN - 2495-3911
DOI - 10.23647/ca.md20202805
Subject(s) - anharmonicity , polarizability , condensed matter physics , lattice (music) , perovskite (structure) , phase transition , phonon , nonlinear system , materials science , chemical physics , physics , chemistry , crystallography , quantum mechanics , molecule , acoustics
The lattice dynamics of perovskite oxides are investigated theoretically within the polarizability model which is a nonlinear approach taking into account anharmonic electron-lattice interactions. The emphasis is on local lattice anomalies which appear in the phonon modes dispersion. Above the actual phase transition temperature finite size polarized clusters appear at an onset temperature TBH which marks the precursor formation temperature. These local anomalies appear as well experimentally and are reviewed for various perovskite compounds.