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Statements

Subject Item
n2:RIV%2F68378271%3A_____%2F12%3A00379177%21RIV13-GA0-68378271
rdf:type
n11:Vysledek skos:Concept
dcterms:description
Our theoretical analysis shows that the lattice instabilities along the a and c crystallographic directions are related to low-frequency transverse optical phonon branches of Sigma 2 and Lambda 3 symmetry, respectively, coupling of the TO and transverse acoustic (TA) modes of Lambda 3 symmetry causes, at somewhat lower temperatures, a series of frozen modulated commensurate and incommensurate states developing along the symmetric Lambda direction. The process of activation of both the Raman- and the IR-active phonons in the structurally modulated phases is subjected to the phenomenological analysis. Our theoretical analysis shows that the lattice instabilities along the a and c crystallographic directions are related to low-frequency transverse optical phonon branches of Sigma 2 and Lambda 3 symmetry, respectively, coupling of the TO and transverse acoustic (TA) modes of Lambda 3 symmetry causes, at somewhat lower temperatures, a series of frozen modulated commensurate and incommensurate states developing along the symmetric Lambda direction. The process of activation of both the Raman- and the IR-active phonons in the structurally modulated phases is subjected to the phenomenological analysis.
dcterms:title
Soft-mode-driven lattice instabilities in Cs2HgCl4 crystal: phenomenological treatment and far-infrared spectroscopy of the structurally modulated phases Soft-mode-driven lattice instabilities in Cs2HgCl4 crystal: phenomenological treatment and far-infrared spectroscopy of the structurally modulated phases
skos:prefLabel
Soft-mode-driven lattice instabilities in Cs2HgCl4 crystal: phenomenological treatment and far-infrared spectroscopy of the structurally modulated phases Soft-mode-driven lattice instabilities in Cs2HgCl4 crystal: phenomenological treatment and far-infrared spectroscopy of the structurally modulated phases
skos:notation
RIV/68378271:_____/12:00379177!RIV13-GA0-68378271
n11:predkladatel
n12:ico%3A68378271
n3:aktivita
n5:P n5:Z
n3:aktivity
P(GAP204/12/1163), Z(AV0Z10100520)
n3:cisloPeriodika
24
n3:dodaniDat
n17:2013
n3:domaciTvurceVysledku
n9:7348320
n3:druhVysledku
n6:J
n3:duvernostUdaju
n10:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
168906
n3:idVysledku
RIV/68378271:_____/12:00379177
n3:jazykVysledku
n19:eng
n3:klicovaSlova
incommensurate phase transitions; phonons; IR spectroscopy
n3:klicoveSlovo
n4:phonons n4:incommensurate%20phase%20transitions n4:IR%20spectroscopy
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[4B547409788D]
n3:nazevZdroje
Journal of Physics-Condensed Matter
n3:obor
n18:BM
n3:pocetDomacichTvurcuVysledku
1
n3:pocetTvurcuVysledku
4
n3:projekt
n14:GAP204%2F12%2F1163
n3:rokUplatneniVysledku
n17:2012
n3:svazekPeriodika
24
n3:tvurceVysledku
Kityk, A. V. Kamba, Stanislav Parasyuk, O. V. Shchur, Y.
n3:wos
000304874900028
n3:zamer
n16:AV0Z10100520
s:issn
0953-8984
s:numberOfPages
15
n15:doi
10.1088/0953-8984/24/24/245901