{
  "id": "cond-mat/0201560",
  "version": "v1",
  "published": "2002-01-30T15:18:18.000Z",
  "updated": "2002-01-30T15:18:18.000Z",
  "title": "The boson peak in structural and orientational glasses of simple alcohols: Specific heat at low temperatures",
  "authors": [
    "Miguel A. Ramos",
    "Cesar Talon",
    "Sebastian Vieira"
  ],
  "comment": "16 pages, 2 figures, Proceedings of the 4th International Discussion Meeting on Relaxations in Complex Systems, Hersonissos (Crete), June 2001. Journal of Non-Crystalline Solids (accepted for publication)",
  "doi": "10.1016/S0022-3093(02)01443-6",
  "categories": [
    "cond-mat.dis-nn",
    "cond-mat.soft"
  ],
  "abstract": "We review in this work specific-heat experiments, that we have conducted on different hydrogen-bonded glasses during last years. Specifically, we have measured the low-temperature specific heat Cp for a set of glassy alcohols: normal and fully-deuterated ethanol, 1- and 2- propanol, and glycerol. Ethanol exhibits a very interesting polymorphism presenting three different solid phases at low temperature: a fully-ordered (monoclinic) crystal, an orientationally-disordered (cubic) crystal or 'orientational glass', and the ordinary structural glass. By measuring and comparing the low-temperature specific heat of the three phases, in the 'boson peak' range 2-10 K as well as in the tunneling-states range below 1K, we are able to provide a quantitative confirmation that ''glassy behavior'' is not an exclusive property of amorphous solids. On the other hand, propanol is the simplest monoalcohol with two different stereoisomers (1- and 2-propanol), what allows us to study directly the influence of the spatial rearrangement of atoms on the universal properties of glasses. We have measured the specific heat of both isomers, finding a noteworthy quantitative difference between them. Finally, low-temperature specific-heat data of glassy glycerol have also been obtained. Here we propose a simple method based upon the soft-potential model to analyze low-temperature specific-heat measurements, and we use this method for a quantitative comparison of all these data of glassy alcohols and as a stringent test of several universal correlations and scaling laws suggested in the literature. In particular, we find that the interstitialcy model for the boson peak [A. V. Granato, Phys. Rev. Lett. 68 (1992) 974] gives a very good account of the temperature at which the maximum in Cp/T^3 occurs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-01-30T15:18:18.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "boson peak",
      "low temperature",
      "orientational glasses",
      "simple alcohols",
      "low-temperature specific heat cp"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 16,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}