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Author (up) Bahrs, S.; Bruchhausen, A.; Goni, A.R.; Nieva, G.; Fainstein, A.; Fleischer, K.; Richter, W.; Thomsen, C. openurl 
  Title Effect of light on the reflectance anisotropy and chain-oxygen related Raman signal in untwinned, underdoped crystals of YBa2Cu3O7-delta Type Journal Article
  Year 2006 Publication JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS Abbreviated Journal  
  Volume 67 Issue 1-3 Pages 340-343  
  Keywords  
  Abstract Recent studies of the optical anisotropy of a detwinned, underdoped YBa2Cu3O7-delta-crystal showed that illumination-induced change and recovery in the surface reflectance can be traced on a time scale of hours. This effect of light is also known from Raman bleaching and electrical transport and shares features of the oxygen reordering processes above room temperature. We report temperature-dependent studies of the optical anisotropy using reflectance anisotropy spectroscopy and present time-dependent data for the optical transitions at 2.2 and 4.4 eV. We compare our results to Raman bleaching and discuss them within the picture of superstructure patterns and oxygen-defect reordering in underdoped YBa2Cu3O7-delta. (c) 2005 Elsevier Ltd. All rights reserved.  
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  Series Volume Series Issue Edition  
  ISSN 0022-3697 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000236746600084 Approved no  
  Call Number BT @ hernan @ Serial 203  
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