Observation of the first-order raman scattering in SrTiO3 thin films

A. A. Sirenko, I. A. Akimov, J. R. Fox, A. M. Clark, Hong Cheng Li, Weidong Si, X. X. Xi

Research output: Contribution to journalArticlepeer-review

141 Scopus citations

Abstract

We have studied lattice dynamic properties of SrTiO3 thin films from 5 to 300 K using metal-oxide bilayer Raman scattering. First-order zone-center optical phonons, symmetry forbidden in single crystals, have been observed in the thin films, indicating strain-induced lowering of symmetry. The asymmetric line shape of the TO2 phonon is interpreted as evidence for micropolar regions in the thin films, likely due to oxygen vacancies. The optical phonon lines and the asymmetry persist up to room temperature.

Original languageEnglish (US)
Pages (from-to)4500-4503
Number of pages4
JournalPhysical Review Letters
Volume82
Issue number22
DOIs
StatePublished - 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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