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Tensile strain induced changes in the optical spectra of SrTiO.sub.3./sub. epitaxial thin films

SYSNO ASEP	0349835
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Tensile strain induced changes in the optical spectra of SrTiO₃ epitaxial thin films
Author(s)	Dejneka, Alexandr (FZU-D)_{RID, ORCID} Tyunina, M. (FI) Narkilahti, J. (FI) Levoska, J. (FI) Chvostová, Dagmar (FZU-D)_{RID, SAI, ORCID} Jastrabík, Lubomír (FZU-D)_{RID, ORCID} Trepakov, Vladimír (FZU-D)_RID
Source Title	Physics of the Solid State. - : Pleiades Publishing - ISSN 1063-7834 Roč. 52, č. 10 (2010), 2082-2089
Number of pages	8 s.
Language	eng - English
Country	RU - Russian Federation
Keywords	SrTiO₃ epitaxial thin films ; effect of biaxial tensile strains on optical spectra
Subject RIV	BM - Solid Matter Physics ; Magnetism
R&D Projects	GA202/08/1009 GA ČR - Czech Science Foundation (CSF)
	KAN301370701 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
	1M06002 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
CEZ	AV0Z10100522 - FZU-D (2005-2011)
UT WOS	000283096600012
DOI	10.1134/S1063783410100124
Annotation	Effect of biaxial tensile strains on optical function and band edge transitions of ultra thin epitaxial films was studied using as an example a 13 nm thick SrTiO3 films deposited on KTaO3 (100) single crystal substrates. Optical functions in the 200–1200 nm spectral range were determined by spectroscopic ellipsometry technique. It was found that tensile strains result in a shift of the low energy band gap optical transitions to higher energies and decrease the refractive index in the visible region. The observed effect is connected with changes in the lowest conduction and in the top valence bands that are due to increase of the in-plane lattice constant and/or onset of the polar phase in the tensile-strain induced ultra-thin SrTiO3 films.
Workplace	Institute of Physics
Contact	Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579
Year of Publishing	2011

Number of the records: 1