High pressure Raman study of Bi-2212

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

dc.contributor.author	Liarokapis, E	en
dc.contributor.author	Lampakis, D	en
dc.contributor.author	Panagopoulos, C	en
dc.contributor.author	Nishizaki, T	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/123456789/30897
dc.subject	Bi2Sr 2CaCu2O8	en
dc.subject	High pressure	en
dc.subject	Phonons	en
dc.subject	Raman	en
dc.subject	Superconductors	en
dc.subject.classification	Physics, Multidisciplinary	en
dc.subject.other	Band structure	en
dc.subject.other	Cryostats	en
dc.subject.other	High pressure effects	en
dc.subject.other	Hydrostatic pressure	en
dc.subject.other	Luminescence	en
dc.subject.other	Phonons	en
dc.subject.other	Raman scattering	en
dc.subject.other	Superconducting materials	en
dc.subject.other	Diamond anvil cells (DAC)	en
dc.subject.other	In-phase vibrations	en
dc.subject.other	Isotropic approximation	en
dc.subject.other	Oxygen atoms	en
dc.subject.other	Bismuth	en
dc.title	High pressure Raman study of Bi-2212	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1080/0895795031000156768	en
heal.identifier.secondary	http://dx.doi.org/10.1080/0895795031000156768	en
heal.language	English	en
heal.publicationDate	2003	en
heal.abstract	The hydrostatic pressure dependence of the Raman spectra of Bi2Sr2CaCu2O8 single crystals has been investigated. The energy of the A(g) and B-1g modes was found to increase with pressure in agreement with previously reported measurements, except the strong mode at similar to465cm(-1), which softens with pressure, while another peak at similar to458 cm(-1) appears more pronounced at low temperatures and high pressures. The energy of both modes does not seem to change with increasing pressure, up to similar to5 GPa, although the average energy of the wide band has been found to soften, which is in disagreement with previously published results. Based on the modifications observed in some phonons at similar to1.8 GPa, which correlate with the reduction of T-c and the deformations of the CuO5 pyramids, we attribute the mode at similar to465 cm(-1) to the vibrations of the apex oxygen atoms. All modes due to the oxygen atoms were found to. be strongly anharmonic.	en
heal.publisher	TAYLOR & FRANCIS LTD	en
heal.journalName	High Pressure Research	en
dc.identifier.doi	10.1080/0895795031000156768	en
dc.identifier.isi	ISI:000184685300020	en
dc.identifier.volume	23	en
dc.identifier.issue	1-2 SPEC. ISS.	en
dc.identifier.spage	111	en
dc.identifier.epage	115	en