Heat capacity at the glass transition

Kostya Trachenko and V. V. Brazhkin
Phys. Rev. B 83, 014201 – Published 6 January 2011

Abstract

A fundamental problem of glass transition is to provide a quantitative and microscopic explanation of the heat-capacity jump at the glass transition temperature Tg. Similar problems are also common to other disordered systems, including spin glasses. We propose that the jump of heat capacity at Tg takes place as a result of the change of the liquid’s elastic, vibrational, and thermal properties. In this theory, we discuss time-dependent effects of glass transition, and identify three distinct regimes of relaxation. Our approach explains a widely observed logarithmic increase of Tg with the quench rate and correlation of the heat-capacity jump with liquid fragility.

  • Received 13 June 2010

DOI:https://doi.org/10.1103/PhysRevB.83.014201

© 2011 American Physical Society

Authors & Affiliations

Kostya Trachenko1,2 and V. V. Brazhkin3

  • 1Department of Physics, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
  • 2Department of Earth Sciences, University of Cambridge, Cambridge CB2 3EQ, United Kingdom
  • 3Institute for High Pressure Physics, Russian Academy of Science (RAS), 142190 Troitsk, Moscow Region, Russia

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Issue

Vol. 83, Iss. 1 — 1 January 2011

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