High-pressure Raman study of CaV2O5

Popovic, ZV; Stergiou, V; Raptis, YS; Konstantinovic, MJ; Isobe, M; Ueda, Y; Moshchalkov, VV

dc.contributor.author	Popovic, ZV	en
dc.contributor.author	Stergiou, V	en
dc.contributor.author	Raptis, YS	en
dc.contributor.author	Konstantinovic, MJ	en
dc.contributor.author	Isobe, M	en
dc.contributor.author	Ueda, Y	en
dc.contributor.author	Moshchalkov, VV	en
dc.date.accessioned	2014-03-01T11:44:30Z
dc.date.available	2014-03-01T11:44:30Z
dc.date.issued	2002	en
dc.identifier.issn	0953-8984	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/36987
dc.subject	High Pressure	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Atoms	en
dc.subject.other	Calcium	en
dc.subject.other	Crystal structure	en
dc.subject.other	Electronic properties	en
dc.subject.other	High pressure effects	en
dc.subject.other	Molecular vibrations	en
dc.subject.other	Phase transitions	en
dc.subject.other	Phonons	en
dc.subject.other	Quantum theory	en
dc.subject.other	Raman spectroscopy	en
dc.subject.other	Calcium vanadium oxide	en
dc.subject.other	Disordered phase	en
dc.subject.other	High pressure Raman spectroscopy	en
dc.subject.other	Layered structure	en
dc.subject.other	Orthorhombic structure	en
dc.subject.other	Structural change	en
dc.subject.other	Calcium compounds	en
dc.title	High-pressure Raman study of CaV2O5	en
heal.type	other	en
heal.identifier.primary	10.1088/0953-8984/14/32/101	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0953-8984/14/32/101	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	The phonon dynamics of the spin ladder calcium vanadium oxide is studied using Raman spectroscopy under high pressure up to 13.5 GPa. Twelve Raman modes, which are observed and assigned at low pressures, disappear at around 9 GPa. With further pressure increase, three broad modes appear at about 325, 750 and 810 cm(-1), indicating the transition of the layered structure into the disordered phase. No scattering activity is found above 13 GPa. The comparison between the vibrational properties of CaV2O5, alpha'-NaV2O5 and V2O5 indicates that anomalous 448 cm(-1) mode hardening in alpha'-NaV2O5 under pressure is also due to structural changes. The intercalation of Ca atoms results in a higher compressibility and stability of the CaV2O5 crystal structure in comparison with V2O5.	en
heal.publisher	IOP PUBLISHING LTD	en
heal.journalName	Journal of Physics Condensed Matter	en
dc.identifier.doi	10.1088/0953-8984/14/32/101	en
dc.identifier.isi	ISI:000177800100001	en
dc.identifier.volume	14	en
dc.identifier.issue	32	en
dc.identifier.spage	L583	en
dc.identifier.epage	L589	en