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Proceedings Paper

Applicability of stretched exponential functions for describing dynamics in disordered solid materials
Author(s): Dirk Apitz; Thomas Garm Pedersen; Per Michael Johansen
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Paper Abstract

Investigating dynamics in a disordered solid material below, at, and well above glass transition temperature, we show that (1) to describe glass dynamics entirely it has to be regarded over a long range on logarithmic time scale, (2) a single stretched exponential function (Kohlrausch-Williams-Watts) can never describe the data, (3) stretching exponents do not cover the ranges previously suggested (from 0 to 1, e.g. as a sigmoid function). Optically recorded dynamics (measured by ellipsometry) is brought into connection with dielectric spectroscopy.

Paper Details

Date Published: 26 October 2004
PDF: 8 pages
Proc. SPIE 5521, Organic Holographic Materials and Applications II, (26 October 2004); doi: 10.1117/12.566075
Show Author Affiliations
Dirk Apitz, Riso National Lab. (Denmark)
Univ. Bonn (Germany)
Thomas Garm Pedersen, Aalborg Univ. (Denmark)
Per Michael Johansen, Riso National Lab. (Denmark)

Published in SPIE Proceedings Vol. 5521:
Organic Holographic Materials and Applications II
Klaus Meerholz, Editor(s)

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