Applicability of stretched exponential functions for describing dynamics in disordered solid materials

Dirk Apitz; Thomas Garm Pedersen; Per Michael Johansen

doi:10.1117/12.566075

26 October 2004 Applicability of stretched exponential functions for describing dynamics in disordered solid materials

Dirk Apitz, Thomas Garm Pedersen, Per Michael Johansen

Proceedings Volume 5521, Organic Holographic Materials and Applications II; (2004) https://doi.org/10.1117/12.566075
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

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.

Citation Download Citation

Dirk Apitz, Thomas Garm Pedersen, and Per Michael Johansen "Applicability of stretched exponential functions for describing dynamics in disordered solid materials", Proc. SPIE 5521, Organic Holographic Materials and Applications II, (26 October 2004); https://doi.org/10.1117/12.566075

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