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IOP Publishing, Journal of Physics: Conference Series, (92), p. 012160, 2007

DOI: 10.1088/1742-6596/92/1/012160

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Acoustic Properties of Nanoscale Oxide Heterostructures Probed by UV Raman Spectroscopy

Journal article published in 2007 by A. Bruchhausen, Nd D. Lanzillotti Kimura ORCID, A. Fainstein, A. Soukiassian, D. Schlom, Dmitri A. Tenne, Xx X. Xi ORCID, A. Cantarero
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We study high quality molecular-beam epitaxy grown BaTiO3/SrTiO3 superlat-tices using ultraviolet Raman spectroscopy. In the low energy spectral region, acoustic phonon doublets are observed. These are due to the artificial superlattice periodicity and consequent folding of the acoustic phonon dispersion. From the study of samples with different BaTiO3/SrTiO3 layer thicknesses the effective sound velocities within each of the layers are obtained.