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Giant LO-TO Frequency Splitting of the Soft Mode in Perovskites.
- Source :
-
Ferroelectrics . Jul2014, Vol. 463 Issue 1, p1-7. 7p. - Publication Year :
- 2014
-
Abstract
- The dispersion analysis of the dielectric spectra of the perovskite ceramics, CaTiO3, and perovskite-like monocrystalline thin films (Ba,Sr)TiO3deposited on a monocrystalline MgO substrate is carried out. The giant LO–TO splitting (∼700 cm−1) of the lowest-frequency absorption band (the soft mode) is found. Due to that splitting the LO and TO frequencies of other phonons are inverted. The result is in a good agreement with first-principle calculations. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00150193
- Volume :
- 463
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Ferroelectrics
- Publication Type :
- Academic Journal
- Accession number :
- 95861781
- Full Text :
- https://doi.org/10.1080/00150193.2014.891416