Pascal Xhonneux, Eric Courtens
Physical Review B
Results of depolarized Raman spectroscopy on fractal silica aerogels are presented at frequencies from 0.3 to 50 cm-1. Three distinct vibration regimes are observed. In the fracton range, a power-law dependence of the Raman susceptibility on the frequency is found. It allows a determination of the superlocalization exponent d. Alternatively, with use of the "resistance" expression for the exponent d a spectral dimension d in fair agreement with previous measurements results. © 1988 The American Physical Society.
Pascal Xhonneux, Eric Courtens
Physical Review B
Eric Courtens, Rene Vacher
Philosophical Magazine B: Physics of Condensed Matter; Statistical Mechanics, Electronic, Optical and Magnetic Properties
Eric Courtens, René Vacher, et al.
Physical Review B
René Vacher, Thierry Woignier, et al.
Journal of Non-Crystalline Solids