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Localization phenomena in models of ion-conducting glass formers

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Abstract.

The mass transport in soft-sphere mixtures of small and big particles as well as in the disordered Lorentz gas (LG) model is studied using molecular dynamics (MD) computer simulations. The soft-sphere mixture shows anomalous small-particle diffusion signifying a localization transition separate from the big-particle glass transition. Switching off small-particle excluded volume constraints slows down the small-particle dynamics, as indicated by incoherent intermediate scattering functions. A comparison of logarithmic time derivatives of the mean-squared displacements reveals qualitative similarities between the localization transition in the soft-sphere mixture and its counterpart in the LG. Nevertheless, qualitative differences emphasize the need for further research elucidating the connection between both models.

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Authors and Affiliations

  1. Institut für Materialphysik im Weltraum, Deutsches Zentrum für Luft- und Raumfahrt (DLR), 51170, Köln, Germany

    J. Horbach & T. Voigtmann

  2. Zukunftskolleg und Fachbereich Physik, Universität Konstanz, Postfach 702, 78457, Konstanz, Germany

    T. Voigtmann

  3. Rudolf Peierls Centre for Theoretical Physics, 1 Keble Road, OX1 3NP, Oxford, UK

    F. Höfling

  4. Max-Planck-Institut für Metallforschung, Heisenbergstraße 3, 70569, Stuttgart, Germany

    F. Höfling

  5. Institut für Theoretische Physik, Universität Erlangen-Nürnberg, Staudtstraße 7, 91058, Erlangen, Germany

    T. Franosch

  6. Arnold Sommerfeld Center for Theoretical Physics (ASC) and Center for NanoScience (CeNS) Fakultät für Physik, Ludwig-Maximilians-Universität München, Theresienstraße 37, 80333, München, Germany

    T. Franosch

  7. Institut für Theoretische und Angewandte Physik, Universität Stuttgart, Pfaffenwaldring 57, 70569, Stuttgart, Germany

    F. Höfling

Authors
  1. J. Horbach
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  2. T. Voigtmann
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  3. F. Höfling
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  4. T. Franosch
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Correspondence to J. Horbach.

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Horbach, J., Voigtmann, T., Höfling, F. et al. Localization phenomena in models of ion-conducting glass formers. Eur. Phys. J. Spec. Top. 189, 141–145 (2010). https://doi.org/10.1140/epjst/e2010-01316-x

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  • DOI: https://doi.org/10.1140/epjst/e2010-01316-x

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