High pressure Raman study of Y-124

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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

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