Local structural distortions and phase separation in cuprates

Lampakis, D; Liarokapis, E; Karpinski, J; Panagopoulos, C; Nishizaki, T

dc.contributor.author	Lampakis, D	en
dc.contributor.author	Liarokapis, E	en
dc.contributor.author	Karpinski, J	en
dc.contributor.author	Panagopoulos, C	en
dc.contributor.author	Nishizaki, T	en
dc.date.accessioned	2014-03-01T01:20:44Z
dc.date.available	2014-03-01T01:20:44Z
dc.date.issued	2004	en
dc.identifier.issn	0896-1107	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16026
dc.subject	Cuprate superconductors	en
dc.subject	Phase separation	en
dc.subject	Phonons	en
dc.subject	Raman Spectroscopy	en
dc.subject.classification	Physics, Applied	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	Crystal lattices	en
dc.subject.other	Hydrostatic pressure	en
dc.subject.other	Phase separation	en
dc.subject.other	Phonons	en
dc.subject.other	Pressure effects	en
dc.subject.other	Raman spectroscopy	en
dc.subject.other	Single crystals	en
dc.subject.other	Superconducting transition temperature	en
dc.subject.other	Thermal effects	en
dc.subject.other	Yttrium barium copper oxides	en
dc.subject.other	Diamond anvil cells (DAC)	en
dc.subject.other	Lattice distortions	en
dc.subject.other	Room temperature	en
dc.subject.other	Oxide superconductors	en
dc.title	Local structural distortions and phase separation in cuprates	en
heal.type	journalArticle	en
heal.identifier.primary	10.1023/B:JOSC.0000011854.25134.eb	en
heal.identifier.secondary	http://dx.doi.org/10.1023/B:JOSC.0000011854.25134.eb	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	We report evidence from Raman measurements of local lattice distortions in the cuprates, which are induced at room temperature by varying the hydrostatic pressure and correlate with changes in the superconducting transition temperature. Anomalous nonlinear pressure dependence is observed for almost all Ag phonons of the YBa2Cu3O6.5, YBa2Cu3Oover, and YBa2Cu 4O8 superconducting single crystals, which occurs at pressures where the transition temperature shows also characteristic changes. The results are compared with a similar correlation found between transition temperature and spectral modifications in Bi2Sr2CaCu 2O8 by pressure and in YBa2Cu3O x and La2-xSrxCuO4 by chemical doping. There are strong indications that the saturation of Tc with pressure or compositional doping in these cuprates is mainly related with lattice instabilities and probably also with phase separation phenomena. © 2004 Plenum Publishing Corporation.	en
heal.publisher	KLUWER ACADEMIC/PLENUM PUBL	en
heal.journalName	Journal of Superconductivity and Novel Magnetism	en
dc.identifier.doi	10.1023/B:JOSC.0000011854.25134.eb	en
dc.identifier.isi	ISI:000188035400025	en
dc.identifier.volume	17	en
dc.identifier.issue	1	en
dc.identifier.spage	121	en
dc.identifier.epage	125	en