Geometric resonances in reflectivity spectra of lead zirconate

0481842 - FZÚ 2018 RIV CZ eng K - Konferenční příspěvek (tuzemská konf.)
Dočekalová, Zuzana - Hlinka, Jiří
Geometric resonances in reflectivity spectra of lead zirconate.
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.), s. 92-97. ISBN 978-80-01-06072-8.
[Studentská vědecká konference fyziky pevných látek /6./. Sedliště (CZ), 27.06.2016-01.07.2016]
Institucionální podpora: RVO:68378271
Klíčová slova: geometric resonances * lead zirconate * antiferroelectrics * reflectivity * phonon
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)

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.
Trvalý link: http://hdl.handle.net/11104/0277301