Počet záznamů: 1

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

  1. 1.
    0349835 - FZU-D 2011 RIV RU eng J - Článek v odborném periodiku
    Dejneka, Alexandr - Tyunina, M. - Narkilahti, J. - Levoska, J. - Chvostová, Dagmar - Jastrabík, Lubomír - Trepakov, Vladimír
    Tensile strain induced changes in the optical spectra of SrTiO3 epitaxial thin films.
    Physics of the Solid State. Roč. 52, č. 10 (2010), 2082-2089 ISSN 1063-7834
    Grant CEP: GA ČR GA202/08/1009; GA AV ČR KAN301370701; GA MŠk(CZ) 1M06002
    Výzkumný záměr: CEZ:AV0Z10100522
    Klíčová slova: SrTiO3 epitaxial thin films * effect of biaxial tensile strains on optical spectra
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 0.727, rok: 2010

    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.
    Trvalý link: http://hdl.handle.net/11104/0006115