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Geometric resonances in reflectivity spectra of lead zirconate
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SYSNO ASEP 0481842 Document Type K - Proceedings Paper (Czech conf.) R&D Document Type Conference Paper Title Geometric resonances in reflectivity spectra of lead zirconate Author(s) Dočekalová, Zuzana (FZU-D)
Hlinka, Jiří (FZU-D) RID, ORCIDNumber of authors 2 Source Title Sborník příspěvků 6. studentské vědecké konference fyziky pevných látek. - Praha : Česká technika - nakladatelství ČVUT, 2016 / Dragounová K. ; Koubský T. ; Kalvoda L. ; Aubrecht J. ; Fojtíková J. - ISBN 978-80-01-06072-8
S. 92-97Number of pages 6 s. Publication form Online - E Action Studentská vědecká konference fyziky pevných látek /6./ Event date 27.06.2016 - 01.07.2016 VEvent location Sedliště Country CZ - Czech Republic Event type EUR Language eng - English Country CZ - Czech Republic Keywords geometric resonances ; lead zirconate ; antiferroelectrics ; reflectivity ; phonon Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) Institutional support FZU-D - RVO:68378271 Annotation The paper deals with effects of domain boundaries on the THz–frequency range dispersion of the complex dielectric permitivity tensor of lead zirconate. In the case of a sufficiently narrow domain widths (in comparison to the wave–length of the light used in the experiment), the effective–medium average permittivity shows additional peaks identified as geometric resonances, i.e. extraneous excitations created by thematerial interface. Features of the far–infrared reflectivity spectra of the twinned lead zirconate crystal in the limit of narrow and wide domains are estimated with the
help of the damped harmonic oscillator model with paramaters fully determined fromrecent experiments.Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2018
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