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Tunable dielectric properties of KTaO3 single crystals in the terahertz range
- 1.0459013 - FZÚ 2017 RIV GB eng J - Journal Article
Skoromets, Volodymyr - Kadlec, Christelle - Němec, Hynek - Fattakhova-Rohlfing, D. - Kužel, Petr
Tunable dielectric properties of KTaO3 single crystals in the terahertz range.
Journal of Physics D-Applied Physics. Roč. 49, č. 6 (2016), 1-6, č. článku 065306. ISSN 0022-3727. E-ISSN 1361-6463
R&D Projects: GA ČR(CZ) GA14-25639S
Institutional support: RVO:68378271
Keywords : ferroelectrics * tunable properties * terahertz spectroscopy * thin-film electrodes * anharmonicity
Subject RIV: BM - Solid Matter Physics ; Magnetism
Impact factor: 2.588, year: 2016
Electric-field tunability of the dielectric properties of potassium tantalate single crystal was studied by terahertz spectroscopy in a broad temperature range (40–250 K). Complex valued terahertz transmission spectra of samples were measured with an external electric field perpendicular to the sample surface and parallel to the terahertz wave-vector. We found that the ferroelectric soft mode hardening is fully responsible for the observed electric field-induced changes in the spectra and no signature of a central mode was detected. We determined the anharmonic properties of the soft-mode potential in the mean field approximation. The observed behavior was compared with that previously reported for SrTiO3 single crystals.
Permanent Link: http://hdl.handle.net/11104/0259219
Number of the records: 1