It was shown that point-like defect model of glasses cannot explain the thermodynamic properties of glass formers, as for example, the excess specific heat close to the glass transition, contrary to the claim of Garrahan and Chandler [2003]. More general models and approaches in terms of extended defects were also considered.

Are Defect Models Consistent with the Entropy and Specific Heat of Glass Formers? G.Biroli, J.P.Bouchaud, G.Tarjus: Journal of Chemical Physics, 2005, 123[4], 044510