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Author (up) Bahrs, S.; Goni, A.R.; Thomsen, C.; Maiorov, B.; Nieva, G.; Fainstein, A. openurl 
  Title Rare-earth dependence of photoinduced chain-oxygen ordering in RBa2Cu3O7-x (x approximate to 0.3) investigated by Raman scattering Type Journal Article
  Year 2002 Publication PHYSICAL REVIEW B Abbreviated Journal  
  Volume 65 Issue 2 Pages 024522  
  Keywords  
  Abstract We investigated a set of oxygen – deficient RBa2Cu3O7-x (xapproximate to0.3) ceramic samples with Raman spectroscopy under resonant conditions for the defect-induced Cu-O chain related modes at 230 and 600 cm(-1). Emphasis was laid on the frequency and intensity of the modes for different rare-earth atoms, and especially on their dependence under illumination. The modes display photoinduced bleaching for all R, including the nonsuperconducting R = Pr. The dynamics of their bleaching following a temperature quench indicates similar complex relaxation processes for all samples. A simple stretched exponential with a common beta = 0.36+/-0.04 and a distribution of time constants ranging from 50 to 1400 s describes our data well. We discuss our results in connection to photoinduced chain-oxygen ordering in oxygen-deficient superconductors.  
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  Series Volume Series Issue Edition  
  ISSN 1098-0121 ISBN Medium  
  Area Expedition Conference  
  Notes ISI:000173213100111 Approved no  
  Call Number BT @ hernan @ Serial 213  
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