Origin of dispersion in dipolar relaxations of glasses

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Abstract

Dispersive relaxations typically found in glassy systems stem from a distribution of response times, spread either heterogeneously of homogeneously within the ensemble of sites. To distinguish between these two possibilities we follow the dynamics of dipole solvation, a technique which provides valuable insight on relaxation in both the liquid and the glassy regime. Employing the dynamic mean spherical approximation (MSA) thory, with ε{lunate}(ω) as an input, we calculate the solvation time evolution in the homogeneous and the heterogeneous limits. Due to the remarkable agreement between the homogeneous MSA and the observed solvation in 2-methyltetrahydrofuran at TG + 3 K=94 K we conclude on the homogeneous nature of dispersion of dipolar relaxations.

Original languageEnglish (US)
Pages (from-to)223-227
Number of pages5
JournalChemical Physics Letters
Volume216
Issue number1-2
DOIs
StatePublished - Dec 24 1993
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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