High pressure Raman study of Y-124

Lampakis, D; Tatsi, A; Liarokapis, E; Karpinski, J

dc.contributor.author	Lampakis, D	en
dc.contributor.author	Tatsi, A	en
dc.contributor.author	Liarokapis, E	en
dc.contributor.author	Karpinski, J	en
dc.date.accessioned	2014-03-01T02:42:16Z
dc.date.available	2014-03-01T02:42:16Z
dc.date.issued	2003	en
dc.identifier.issn	0895-7959	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30898
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-2542520938&partnerID=40&md5=831621092682a9016aecddfc990c37ca	en
dc.subject	High pressure	en
dc.subject	Phonons	en
dc.subject	Raman	en
dc.subject	Superconductors	en
dc.subject	YBa2Cu 4O8	en
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.other	Chemical bonds	en
dc.subject.other	High pressure effects	en
dc.subject.other	Hydrostatic pressure	en
dc.subject.other	Lattice constants	en
dc.subject.other	Luminescence	en
dc.subject.other	Phonons	en
dc.subject.other	Pressure measurement	en
dc.subject.other	Single crystals	en
dc.subject.other	Superconducting materials	en
dc.subject.other	Coulomb forces	en
dc.subject.other	Critical temperature	en
dc.subject.other	Raman	en
dc.subject.other	Yttrium compounds	en
dc.title	High pressure Raman study of Y-124	en
heal.type	conferenceItem	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	In this work, a micro-Raman study under high hydrostatic pressure (up to similar to5.5 GPa) has been carried on YBa2Cu4O8 and Y(Ba, Sr)(2)Cu4O8 single crystals at room temperature. In both samples, seven strong modes, of A(g) symmetry, and one weak, of B-3g symmetry, have been observed and examined in connection with previously published results concerning YBa2Cu4O8. With the Sr substitution for Ba, the ambient pressure measurements show an upward shift in energy for all modes, except those that involve vibrations of the plane and apex oxygen atoms. With increasing hydrostatic pressure all phonons shift to higher energies. Anomalous nonlinear pressure behaviour has been observed for three phonons, which is correlated with the pressure dependence of T-c of these compounds.	en
heal.publisher	TAYLOR & FRANCIS LTD	en
heal.journalName	High Pressure Research	en
dc.identifier.isi	ISI:000184685300022	en
dc.identifier.volume	23	en
dc.identifier.issue	1-2 SPEC. ISS.	en
dc.identifier.spage	123	en
dc.identifier.epage	128	en