Pressure effects in the Raman spectra of La2-xSrxCuO4

Lampakis, D; Liarokapis, E; Lykodimos, V; Panagopoulos, C

dc.contributor.author	Lampakis, D	en
dc.contributor.author	Liarokapis, E	en
dc.contributor.author	Lykodimos, V	en
dc.contributor.author	Panagopoulos, C	en
dc.date.accessioned	2014-03-01T01:18:15Z
dc.date.available	2014-03-01T01:18:15Z
dc.date.issued	2002	en
dc.identifier.issn	0895-7959	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14890
dc.subject	High pressure	en
dc.subject	La2-xSrxCuO4	en
dc.subject	Low temperatures	en
dc.subject	Phonons	en
dc.subject	Raman	en
dc.subject	Superconductors	en
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.other	Charge coupled devices	en
dc.subject.other	Crystal structure	en
dc.subject.other	Doping (additives)	en
dc.subject.other	Hydrostatic pressure	en
dc.subject.other	Polarization	en
dc.subject.other	Raman scattering	en
dc.subject.other	Superconducting materials	en
dc.subject.other	Superconducting transition temperature	en
dc.subject.other	High pressures	en
dc.subject.other	La2-xSrxCuO4	en
dc.subject.other	Low temperature	en
dc.subject.other	Raman	en
dc.subject.other	Lanthanum alloys	en
dc.title	Pressure effects in the Raman spectra of La2-xSrxCuO4	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/08957950211368	en
heal.identifier.secondary	http://dx.doi.org/10.1080/08957950211368	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	Micro-Raman measurements under hydrostatic pressures up to 6 GPa have been carried out on high-quality La2-xSrxCuO4 polycrystalline compounds with Sr concentration up to x = 0.45. The zz scattering polarization has been investigated, where two strong modes due to La/Sr and the apex oxygen, and (in the low Sr concentrations) the soft mode at similar to100 cm(-1) are observed. The frequency of the strong modes increases almost linearly with pressure for the Sr concentrations studied. Modifications in the increment rate domega/dp and the phonon width have been detected depending on the amount of doping. For x 0.45 a considerable increase in the width of both strong phonons with pressure was found, which must reflect a separation into phases, since this concentration is close to the solubility limit. The relative intensity of the strong phonons was investigated in connection with its correlation to the transition temperature.	en
heal.publisher	TAYLOR & FRANCIS LTD	en
heal.journalName	High Pressure Research	en
dc.identifier.doi	10.1080/08957950211368	en
dc.identifier.isi	ISI:000176798900018	en
dc.identifier.volume	22	en
dc.identifier.issue	1	en
dc.identifier.spage	83	en
dc.identifier.epage	87	en