About: Optical probe of ferroelectric order in bulk and thin-film perovskite titanates

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About: Optical probe of ferroelectric order in bulk and thin-film perovskite titanates Goto Sponge NotDistinct Permalink

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Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://journals.aps.org/prb/abstract/10.1103/PhysRevB.88.104110
Description	We have measured the temperature dependence of the direct band gap Eg in SrTiO3 and BaTiO3 and related materials with quantum-paraelectric and ferroelectric properties using optical spectroscopy. We show that Eg exhibits an anomalous temperature dependence with pronounced changes in the vicinity of the ferroelectric transition that can be accounted for in terms of the Frohlich electron-phonon interaction with an optical phonon mode, the so-called soft mode. In addition, we demonstrate that these characteristic changes of Eg can be readily detected even in very thin films of SrTiO3 with a strain-induced ferroelectric order. Optical spectroscopy thus can be used as a rather sensitive probe of ferroelectric order in very thin films of these titanates and probably also in subsequent multilayers and devices. We have measured the temperature dependence of the direct band gap Eg in SrTiO3 and BaTiO3 and related materials with quantum-paraelectric and ferroelectric properties using optical spectroscopy. We show that Eg exhibits an anomalous temperature dependence with pronounced changes in the vicinity of the ferroelectric transition that can be accounted for in terms of the Frohlich electron-phonon interaction with an optical phonon mode, the so-called soft mode. In addition, we demonstrate that these characteristic changes of Eg can be readily detected even in very thin films of SrTiO3 with a strain-induced ferroelectric order. Optical spectroscopy thus can be used as a rather sensitive probe of ferroelectric order in very thin films of these titanates and probably also in subsequent multilayers and devices. (en)
Title	Optical probe of ferroelectric order in bulk and thin-film perovskite titanates Optical probe of ferroelectric order in bulk and thin-film perovskite titanates (en)
skos:prefLabel	Optical probe of ferroelectric order in bulk and thin-film perovskite titanates Optical probe of ferroelectric order in bulk and thin-film perovskite titanates (en)
skos:notation	RIV/00216224:14740/13:00070505!RIV14-MSM-14740___
http://linked.open...avai/predkladatel	Středoevropský technologický institut
http://linked.open...avai/riv/aktivita	P S
http://linked.open...avai/riv/aktivity	P(ED1.1.00/02.0068), P(EE2.3.20.0027), S
http://linked.open...iv/cisloPeriodika	10
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Humlíček, Josef Dubroka, Adam
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	Masarykova univerzita / Středoevropský technologický institut
http://linked.open...dnocenehoVysledku	94237
http://linked.open...ai/riv/idVysledku	RIV/00216224:14740/13:00070505
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	quantum dots; SiGe; photoluminescence; excitonic structure; biexciton (en)
http://linked.open.../riv/klicoveSlovo	SiGe photoluminescence quantum dots biexciton excitonic structure
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[8CC23B4001C8]
http://linked.open...i/riv/nazevZdroje	Physical Review B
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	11 (xsd:int)
http://linked.open...vavai/riv/projekt	Support of Excellence Research Teams in the Field of Nanotechnologies and Microtechnologies Central european institute of technology
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	88
http://linked.open...iv/tvurceVysledku	Maršík, Přemysl Dubroka, Adam Humlíček, Josef Kim, K. W. Bernhard, Christian Yazdi-Rizi, M. Baeriswyl, Dionys Marozau, I. Rossle, Matthias Schneider, C. W. Wang, C.N.
http://linked.open...ain/vavai/riv/wos	000324943800003
issn	1098-0121
number of pages	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevB.88.104110
http://localhost/t...ganizacniJednotka	14740

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