6533b837fe1ef96bd12a3047
RESEARCH PRODUCT
Jahn-Teller effect in the phonon properties of defective SrTiO3from first principles
Rotraut MerkleD. GryaznovD. GryaznovRobert A. EvarestovEvgeny BlokhinJoachim MaierEugene A. KotominEugene A. Kotominsubject
PhysicsCondensed matter physicsPhononJahn–Teller effectSurface phononCondensed Matter PhysicsSymmetry (physics)Electronic Optical and Magnetic MaterialsGibbs free energysymbols.namesakePerfect crystalCondensed Matter::SuperconductivityMolecular vibrationsymbolsCondensed Matter::Strongly Correlated ElectronsRaman spectroscopydescription
the Jahn–Teller effect occurs, thus reducing the cubic symmetry of a perfect crystal and leading to the appearance of both Raman- and infrared-active vibrational modes. The calculated phonon densities of states and group-theoretical analysis of defect-induced phonon frequencies were used for the interpretation of the relevant experimental data, once defect-induced local modes are identified. The temperature dependence of the Vo formation energy based on the calculated Gibbs free energy was also compared with experiments, and the phonon contribution therein estimated.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-05-17 | Physical Review B |