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Author Bahrs, S.; Goni, A.R.; Maiorov, B.; Nieva, G.; Fainstein, A.; Thomsen, C.
Title Raman-study of photoinduced chain-oxygen ordering in RBa2Cu3O7-delta Type Journal Article
Year 2003 Publication IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY Abbreviated Journal
Volume 13 Issue 2 Pages 3192-3195
Keywords
Abstract We investigated Raman-forbidden signals in RBa2Cu3O7-delta with R = Y or Pr, which lose intensity under illumination at low temperatures. These defect-induced,peaks are only visible in oxygen-deficient material and for light polarized parallel to the copper-oxygen chains along the material's b-axis. In a first, two-laser based experiment we established that the bleaching effect of the light is polarization dependent as well. From this and other known properties we conclude that the signal is connected to the copper-oxygen chains, reflecting their state of disorder, and is thus closely related to aging and to the persistent photoconductivity effect in the material. In a second set of experiments we followed the temperature dependence of the Raman spectra and the intensity decrease.
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Publisher Place of Publication Editor
Language Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1051-8223 ISBN Medium
Area Expedition Conference
Notes ISI:000184242400193 Approved no
Call Number BT @ hernan @ Serial 209
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