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Tuning of dielectric properties of SrTiO.sub.3./sub. in the terahertz range
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SYSNO ASEP 0369878 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Tuning of dielectric properties of SrTiO3 in the terahertz range Author(s) Skoromets, Volodymyr (FZU-D) RID
Kadlec, Filip (FZU-D) RID, ORCID, SAI
Kadlec, Christelle (FZU-D) RID, ORCID
Němec, Hynek (FZU-D) RID, ORCID, SAI
Rychetský, Ivan (FZU-D) RID, ORCID
Panaitov, G. (DE)
Müller, V. (DE)
Fattakhova-Rohlfing, D. (DE)
Moch, P. (FR)
Kužel, Petr (FZU-D) RID, ORCID, SAISource Title Physical Review. B - ISSN 1098-0121
Roč. 84, č. 17 (2011), "174121-1"-"174121-10"Number of pages 10 s. Language eng - English Country US - United States Keywords strontium titanate ; terahertz spectroscopy ; anharmonic coefficient Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GD202/09/H041 GA ČR - Czech Science Foundation (CSF) IAA100100907 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) GA202/09/0430 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100520 - FZU-D (2005-2011) UT WOS 000297294600002 DOI 10.1103/PhysRevB.84.174121 Annotation Tuning of the dielectric permittivity spectra of strontium titanate (SrTiO3) single crystals in an external electric field is investigated between 90 and 300 K by means of terahertz time-domain spectroscopy. Application of the electric bias leads to an appreciable tuning of the permittivity observed up to room temperature both in the parallel and perpendicular directions to the bias field. The observed behavior is interpreted in terms of soft-mode hardening due to the anharmonic character of its potential. No additional low-frequency relaxation mode was observed. A weak temperature dependence of the anharmonic coefficients was found in agreement with previously published low-temperature data. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2012
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