6533b7d2fe1ef96bd125e93e
RESEARCH PRODUCT
Underdamped soft phonon in orthorhombic BaTiO3
K. LaabidiMarc D. FontanaB. Jannotsubject
chemistry.chemical_classificationCondensed matter physicsPhononGeneral ChemistryLow frequencyCondensed Matter PhysicsSpectral lineCondensed Matter::Materials ScienceTetragonal crystal systemsymbols.namesakechemistryCondensed Matter::SuperconductivityPhase (matter)Materials ChemistrysymbolsCondensed Matter::Strongly Correlated ElectronsOrthorhombic crystal systemInorganic compoundRaman scatteringdescription
Abstract Raman scattering measurements are reported in orthorhombic phase and through the orthorhombic-rhombohedral transition of BaTiO3. Spectra reveal the presence of an underdamped low frequency phonon which slightly softens with decreasing temperature and abruptly stiffens at the transition to the rhombohedral phase. Results are discussed in comparison with isomorphous KNbO3 and tetragonal BaTiO3 and are interpreted as due to a dominant displacive mechanism.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1990-11-01 | Solid State Communications |