About: Systematic study of terahertz response of SrTiO3 based heterostructures: Influence of strain, temperature, and electric field

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Epitaxial heterostructures consisting of a variable number of SrTiO3/DyScO3 bilayers deposited on DyScO3 substrates were investigated using time-domain terahertz spectroscopy down to helium temperatures. The phase transition into a ferroelectric state is observed in SrTiO3 films in all samples close to 300 K due to in-plane epitaxial strain induced by the substrate and intercalated layers of DyScO3. Evolution of the dielectric spectra with temperature and external electric field is described by a general model which involves a damped harmonic oscillator (soft mode) coupled to a Debye relaxation (central mode). Both modes are connected with the soft mode eigenvector and they reflect a strong anharmonicity of the soft-mode potential. The observed variation of phase transition temperature and of the dielectric response among the structures is ascribed to a partial epitaxial strain relaxation confirmed also by x-ray diffraction. Epitaxial heterostructures consisting of a variable number of SrTiO3/DyScO3 bilayers deposited on DyScO3 substrates were investigated using time-domain terahertz spectroscopy down to helium temperatures. The phase transition into a ferroelectric state is observed in SrTiO3 films in all samples close to 300 K due to in-plane epitaxial strain induced by the substrate and intercalated layers of DyScO3. Evolution of the dielectric spectra with temperature and external electric field is described by a general model which involves a damped harmonic oscillator (soft mode) coupled to a Debye relaxation (central mode). Both modes are connected with the soft mode eigenvector and they reflect a strong anharmonicity of the soft-mode potential. The observed variation of phase transition temperature and of the dielectric response among the structures is ascribed to a partial epitaxial strain relaxation confirmed also by x-ray diffraction. (en)
Title	Systematic study of terahertz response of SrTiO3 based heterostructures: Influence of strain, temperature, and electric field Systematic study of terahertz response of SrTiO3 based heterostructures: Influence of strain, temperature, and electric field (en)
skos:prefLabel	Systematic study of terahertz response of SrTiO3 based heterostructures: Influence of strain, temperature, and electric field Systematic study of terahertz response of SrTiO3 based heterostructures: Influence of strain, temperature, and electric field (en)
skos:notation	RIV/68378271:_____/14:00434411!RIV15-GA0-68378271
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GA14-25639S)
http://linked.open...iv/cisloPeriodika	21
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Hlinka, Jiří Drahokoupil, Jan Kužel, Petr Kadlec, Christelle 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	49201
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/14:00434411
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	dielectric response; terahertz spectroscopy; ferroelectrics; thin films; phase transition (en)
http://linked.open.../riv/klicoveSlovo	terahertz spectroscopy dielectric response phase transition ferroelectrics thin films
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[863B7B034E69]
http://linked.open...i/riv/nazevZdroje	Physical Review. B
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Ladění terahertzové odezvy dielektrických materiálů a metamateriálových struktur
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	89
http://linked.open...iv/tvurceVysledku	Drahokoupil, Jan Hlinka, Jiří Kužel, Petr Skoromets, Volodymyr Kadlec, Christelle Schubert, J.
http://linked.open...ain/vavai/riv/wos	000339048100001
issn	1098-0121
number of pages	12 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevB.89.214116

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