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Statements

Subject Item
n2:RIV%2F00216224%3A14740%2F13%3A00070505%21RIV14-MSM-14740___
rdf:type
n12:Vysledek skos:Concept
rdfs:seeAlso
http://journals.aps.org/prb/abstract/10.1103/PhysRevB.88.104110
dcterms: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.
dcterms: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
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
skos:notation
RIV/00216224:14740/13:00070505!RIV14-MSM-14740___
n12:predkladatel
n13:orjk%3A14740
n3:aktivita
n11:S n11:P
n3:aktivity
P(ED1.1.00/02.0068), P(EE2.3.20.0027), S
n3:cisloPeriodika
10
n3:dodaniDat
n20:2014
n3:domaciTvurceVysledku
n19:1647652 n19:1834282
n3:druhVysledku
n15:J
n3:duvernostUdaju
n18:S
n3:entitaPredkladatele
n4:predkladatel
n3:idSjednocenehoVysledku
94237
n3:idVysledku
RIV/00216224:14740/13:00070505
n3:jazykVysledku
n21:eng
n3:klicovaSlova
quantum dots; SiGe; photoluminescence; excitonic structure; biexciton
n3:klicoveSlovo
n10:quantum%20dots n10:photoluminescence n10:SiGe n10:biexciton n10:excitonic%20structure
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[8CC23B4001C8]
n3:nazevZdroje
Physical Review B
n3:obor
n16:BM
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
11
n3:projekt
n5:EE2.3.20.0027 n5:ED1.1.00%2F02.0068
n3:rokUplatneniVysledku
n20:2013
n3:svazekPeriodika
88
n3:tvurceVysledku
Marozau, I. Schneider, C. W. Maršík, Přemysl Wang, C.N. Humlíček, Josef Dubroka, Adam Yazdi-Rizi, M. Rossle, Matthias Baeriswyl, Dionys Kim, K. W. Bernhard, Christian
n3:wos
000324943800003
s:issn
1098-0121
s:numberOfPages
7
n8:doi
10.1103/PhysRevB.88.104110
n17:organizacniJednotka
14740