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

D. Apitz*, Thomas Garm Pedersen, P. M. Johansen

*Kontaktforfatter

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    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.

    OriginalsprogEngelsk
    TitelProc. SPIE 5521, Organic Holographic Materials and Applications II
    RedaktørerKlaus Meerholz
    Antal sider9
    Vol/bind5521
    ForlagSPIE - International Society for Optical Engineering
    Publikationsdato2004
    Sider181-189
    Artikelnummer 29
    DOI
    StatusUdgivet - 2004
    BegivenhedSPIE International Symposium on Optical Science and Technology: 49th SPIE Annual Meeting - Denver, CO, USA
    Varighed: 2 aug. 20046 aug. 2004
    Konferencens nummer: 49

    Konference

    KonferenceSPIE International Symposium on Optical Science and Technology
    Nummer49
    Land/OmrådeUSA
    ByDenver, CO
    Periode02/08/200406/08/2004
    NavnProceedings of S P I E - International Society for Optical Engineering
    Vol/bind5521
    ISSN0277-786X

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