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Raman study of La2CuO4: Possibility of local symmetry breaking

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dc.contributor.author Kourouklis, GA en
dc.contributor.author Jayaraman, A en
dc.contributor.author Weber, W en
dc.contributor.author Remeika, JP en
dc.contributor.author Espinosa, GP en
dc.contributor.author Cooper, AS en
dc.contributor.author Maines Sr ,RG en
dc.date.accessioned 2014-03-01T01:39:14Z
dc.date.available 2014-03-01T01:39:14Z
dc.date.issued 1987 en
dc.identifier.issn 01631829 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/22633
dc.title Raman study of La2CuO4: Possibility of local symmetry breaking en
heal.type journalArticle en
heal.identifier.primary 10.1103/PhysRevB.36.7218 en
heal.identifier.secondary http://dx.doi.org/10.1103/PhysRevB.36.7218 en
heal.publicationDate 1987 en
heal.abstract Raman spectra on flux-grown single crystals of La2CuO4 show two modes in the range of O stretch vibrations, near 426 and 526 cm-1. The latter line exhibits a very large intensity and has polarization features consistent with an in-plane O stretch vibration. The 426 cm-1 line is assigned to the axial O stretch mode, also found in superconducting La2-x(Ba,Sr)xCuO4. The prominent 526 cm-1 line is observed over the temperature range from 77 to 600 K; i.e., even in the high-temperature tetragonal phase, where, by symmetry arguments, no in-plane O stretch mode is Raman allowed. We believe that the presence of this mode indicates local symmetry breaking, possibly due to antiferromagnetic fluctuations. © 1987 The American Physical Society. en
heal.journalName Physical Review B en
dc.identifier.doi 10.1103/PhysRevB.36.7218 en
dc.identifier.volume 36 en
dc.identifier.issue 13 en
dc.identifier.spage 7218 en
dc.identifier.epage 7221 en


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