CuO-chain Raman scattering and photoinduced metastability in YBa2Cu3Ox

M. Käll, M. Osada, M. Kakihana, L. Börjesson, T. Frello, J. Madsen, N.H. Andersen, R. Liang, P. Dosanjh, W.N. Hardy

    Research output: Contribution to journalJournal articleResearch

    Abstract

    Raman measurements in YBa2Cu3Ox (x=6.72-6.82) high-T-c superconductors reveal intense phonon scattering due to an electronic resonance localized near oxygen vacancies on the CuO chains. Below room temperature the resonance can be photobleached in a manner similar to reported persistent photoinduced superconductivity effects, indicating photon-assisted oxygen ordering or electron vacancy capture. By comparing Raman and x-ray diffraction data we establish a correlation between the stability of the photoinduced state and the oxygen-ordering kinetics in the CuO chains.
    Original languageEnglish
    JournalPhysical Review B Condensed Matter
    Volume57
    Issue number22
    Pages (from-to)R14072-R14075
    ISSN0163-1829
    DOIs
    Publication statusPublished - 1998

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