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

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Abstract

Raman measurements in YBa2Cu3Ox (x = 6.72-6.82) high-Tc 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 and Materials Physics
Volume57
Issue number22
Publication statusPublished - 1998 Jun 1
Externally publishedYes

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ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Käll, M., Osada, M., Kakihana, M., Börjesson, L., Frello, T., Madsen, J., Andersen, N. H., Liang, R., Dosanjh, P., & Hardy, W. N. (1998). CuO-chain Raman scattering and photoinduced metastability in YBa2Cu3Ox. Physical Review B - Condensed Matter and Materials Physics, 57(22).