About: Soft-mode-driven lattice instabilities in Cs2HgCl4 crystal: phenomenological treatment and far-infrared spectroscopy of the structurally modulated phases

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About: Soft-mode-driven lattice instabilities in Cs2HgCl4 crystal: phenomenological treatment and far-infrared spectroscopy of the structurally modulated phases Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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. (en)
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 (en)
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 (en)
skos:notation	RIV/68378271:_____/12:00379177!RIV13-GA0-68378271
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GAP204/12/1163), Z(AV0Z10100520)
http://linked.open...iv/cisloPeriodika	24
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Kamba, Stanislav
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	168906
http://linked.open...ai/riv/idVysledku	RIV/68378271:_____/12:00379177
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	incommensurate phase transitions; phonons; IR spectroscopy (en)
http://linked.open.../riv/klicoveSlovo	phonons incommensurate phase transitions IR spectroscopy
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[4B547409788D]
http://linked.open...i/riv/nazevZdroje	Journal of Physics-Condensed Matter
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Phonon and dielectric spectroscopy of multiferroics
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	24
http://linked.open...iv/tvurceVysledku	Kamba, Stanislav Parasyuk, O. V. Kityk, A. V. Shchur, Y.
http://linked.open...ain/vavai/riv/wos	000304874900028
http://linked.open...n/vavai/riv/zamer	Specific effects in condensed systems with reduced dimension and broken symmetry
issn	0953-8984
number of pages	15 (xsd:int)
http://bibframe.org/vocab/doi	10.1088/0953-8984/24/24/245901

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