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Temperature dependent optical properties of Mn doped (Pb,Sr)TiO3 ferroelectric films in absorption region: Electron-phonon interaction.
- Source :
- Journal of Applied Physics; Dec2010, Vol. 108 Issue 11, p114102, 5p, 4 Graphs
- Publication Year :
- 2010
-
Abstract
- The 2 mol % Mn doped Pb<subscript>0.5</subscript>Sr<subscript>0.5</subscript>TiO<subscript>3</subscript> films were fabricated on sapphire substrates by chemical solution deposition. The complex dielectric functions and optical parameters of the films determined by transmittance spectroscopy in a broad temperature range of 80-500 K were investigated. Apparent thermally-driven band-gap energy shrinkage, line-width of interband electron transition broadening and the Urbach band tail behaviors were observed. The results can be mainly correlated with the renormalization of electronic band structure and band-gap energy due to the electron-phonon interaction, which is well established in terms of the Bose-Einstein model. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 108
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 55830715
- Full Text :
- https://doi.org/10.1063/1.3516157