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Journal article

CuO-chain Raman scattering and photoinduced metastability in YBa2Cu3Ox

By Käll, M.; Osada, M.; Kakihana, M.; Börjesson, L.; Frello, T.1; Madsen, J.; Andersen, N.H.1; Liang, R.; Dosanjh, P.; Hardy, W.N.

From

Risø National Laboratory for Sustainable Energy, Technical University of Denmark1

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.

Language: English
Year: 1998
ISSN: 1550235x , 10980121 and 01631829
Types: Journal article
DOI: 10.1103/PhysRevB.57.R14072
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