About: Ferroelectric phase transition in polycrystalline KTaO3 thin film revealed by terahertz spectroscopy

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About: Ferroelectric phase transition in polycrystalline KTaO3 thin film revealed by terahertz spectroscopy Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	KTaO3 single crystal is an archetypal incipient ferroelectric in which a long-range ferroelectric order does not establish at low temperatures owing to quantum fluctuations. We report on a strong evidence of the ferroelectric phase transition near 60 K revealed by terahertz spectroscopy and microwave permittivity measurements of a polycrystalline KTaO3 thin film on (0001) sapphire substrate prepared by chemical solution deposition. The soft mode behavior is clearly observed in the terahertz (THz) spectra with a minimum frequency at 60 K. At the same temperature microwave permittivity maximum appears. The THz spectra strongly resemble that of strained epitaxial SrTiO3/DyScO3 films: the ferroelectric soft mode is linearly coupled to a central peak which is silent in the paraelectric phase and it becomes coupled to the polarization below the ferroelectric transition temperature with a progressively increasing bare strength. KTaO3 single crystal is an archetypal incipient ferroelectric in which a long-range ferroelectric order does not establish at low temperatures owing to quantum fluctuations. We report on a strong evidence of the ferroelectric phase transition near 60 K revealed by terahertz spectroscopy and microwave permittivity measurements of a polycrystalline KTaO3 thin film on (0001) sapphire substrate prepared by chemical solution deposition. The soft mode behavior is clearly observed in the terahertz (THz) spectra with a minimum frequency at 60 K. At the same temperature microwave permittivity maximum appears. The THz spectra strongly resemble that of strained epitaxial SrTiO3/DyScO3 films: the ferroelectric soft mode is linearly coupled to a central peak which is silent in the paraelectric phase and it becomes coupled to the polarization below the ferroelectric transition temperature with a progressively increasing bare strength. (en)
Title	Ferroelectric phase transition in polycrystalline KTaO3 thin film revealed by terahertz spectroscopy Ferroelectric phase transition in polycrystalline KTaO3 thin film revealed by terahertz spectroscopy (en)
skos:prefLabel	Ferroelectric phase transition in polycrystalline KTaO3 thin film revealed by terahertz spectroscopy Ferroelectric phase transition in polycrystalline KTaO3 thin film revealed by terahertz spectroscopy (en)
skos:notation	RIV/68378271:_____/11:00373954!RIV12-AV0-68378271
http://linked.open...avai/predkladatel	Fyzikální ústav AV ČR, v.v.i.
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GD202/09/H041), P(IAA100100907), Z(AV0Z10100520)
http://linked.open...iv/cisloPeriodika	5
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Petzelt, Jan Kempa, Martin Kamba, Stanislav Kužel, Petr Bovtun, Viktor Skoromets, Volodymyr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Fyzikální ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	199549
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/11:00373954
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	thin film; terahertz spectroscopy; ferroelectric phase transition (en)
http://linked.open.../riv/klicoveSlovo	ferroelectric phase transition terahertz spectroscopy thin film
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[2AD194658E19]
http://linked.open...i/riv/nazevZdroje	Applied Physics Letters
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	6 (xsd:int)
http://linked.open...cetTvurcuVysledku	9 (xsd:int)
http://linked.open...vavai/riv/projekt	Actively tunable structures and metamaterials for the terahertz range Physics of nanostructures
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	99
http://linked.open...iv/tvurceVysledku	Bovtun, Viktor Kosec, M. Kamba, Stanislav Kempa, Martin Kužel, Petr Petzelt, Jan Glinšek, S. Malič, B. Skoromets, Volodymyr
http://linked.open...ain/vavai/riv/wos	000293617300062
http://linked.open...n/vavai/riv/zamer	Specific effects in condensed systems with reduced dimension and broken symmetry
issn	0003-6951
number of pages	3 (xsd:int)
http://bibframe.org/vocab/doi	10.1063/1.3624710
is http://linked.open...avai/riv/vysledek of	Ferroelectric phase transition in polycrystalline KTaO3 thin film revealed by terahertz spectroscopy Ferroelectric phase transition in polycrystalline KTaO3 thin film revealed by terahertz spectroscopy

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