Kovacs effect in glass with material memory revealed in non-equilibrium particle interactions

  title={Kovacs effect in glass with material memory revealed in non-equilibrium particle interactions},
  author={Matteo Lulli and Chun-Shing Lee and Ling-Han Zhang and Hai-Yao Deng and Chi-Hang Lam},
  journal={Journal of Statistical Mechanics: Theory and Experiment},
The Kovacs effect is a remarkable feature of the ageing dynamics of glass forming liquids near the glass transition temperature. It consists in a non-monotonous evolution of the volume/enthalpy after a succession of two abrupt temperature changes: first from a high initial temperature T i to a much lower annealing temperature T a followed by a smaller second jump back to a slightly higher final temperature T f. The second change is performed when the instantaneous value of the volume/enthalpy… 


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