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On the dynamics of the orientationally disordered ionic crytals in two dimensions

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Zeitschrift für Physik B Condensed Matter

Abstract

The translational and rotational generalized susceptibilities have been calculated in a two-dimensional model crystal with orientational disorder. The Michel and Naudts' method has been employed to account for the rotation-translation coupling. The elastic and displacive character of the phase transition in the system has been shown to be independent of the mass and of the size of the disordered molecular ions. The plausibility of the third order continuous fraction expansion of the dynamic susceptibilities has been evidenced. The influence of the rotation-translation coupling on the dispersion relations are shown to be of the character observed experimentally.

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Authors and Affiliations

  1. Institute of Nuclear Physics, ul. Radzikowskiego 152, PL-31-342, Kraków, Poland

    P. Zieliński

  2. Laboratoire de Dynamique des Cristaux Moleculaires (U.A. CNRS 801), Université de Lille I, F-59655, Villeneuve d'Ascq, France

    P. Zieliński

  3. Academy of Economics, Kraków, Poland

    K. Żabińska

Authors
  1. P. Zieliński
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  2. K. Żabińska
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Zieliński, P., Żabińska, K. On the dynamics of the orientationally disordered ionic crytals in two dimensions. Z. Physik B - Condensed Matter 66, 345–353 (1987). https://doi.org/10.1007/BF01305425

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  • DOI: https://doi.org/10.1007/BF01305425

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