Journal Article

PreJuSER-17641

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Tuning of dielectric properties of SrTiO3 in the terahertz range

Skoromets, V. ; Kadlec, F. ; Nemec, H. ; Rychetsky, I. ; Panaitov, G.FZJ* ; Müller, V. ; Fattakhova-Rohlfing, D. ; Moch, P. ; Ku¸el, P.

2011
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/10904  doi:10.1103/PhysRevB.84.174121

Abstract: 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.

Keyword(s): J

Note: This work was supported by the Czech Academy of Sciences (Project AVOZ 10100520) and its Grant Agency (Project A100100907) and by the Czech Science Foundation (Projects 202/09/H041, 202/09/0430, and SVV-2011-263303).

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Contributing Institute(s):

1. Bioelektronik (PGI-8)
2. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2011

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