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Annealing disorder and photoinduced order of oxygen chains in detwinnedYBa2Cu3O6.65single crystals probed by Raman scattering
2000
Physical Review B (Condensed Matter)
Raman scattering in detwinned YBa 2 Cu 3 O 6.65 single crystals is studied as a function of photoexcitation and annealing. Copper-oxygen chain-related forbidden Raman bands that are known to strongly bleach with illumination at low temperatures, increase their intensity with chain fragmentation induced by annealing at high temperature. This contrasting behavior proves the conjunction of short Cu-O fragments into longer chains on photoexcitation. We interpret the Raman modes as due to vibrations
doi:10.1103/physrevb.61.4298
fatcat:x4qctlt5vnehpcgy4oihfnycqy