Abstract:Année de publication : 2010
We study theoretically the non-linear response properties of glass formers. We establish several general results which, together with the assumption of Time-Temperature Superposition, lead to a relation between the non-linear response and the derivative of the linear response with respect to temperature. Using results from Mode-Coupling Theory (MCT) and scaling arguments valid close to the glass transition, we obtain the frequency and temperature dependence of the non-linear response in the alpha and beta-regimes. These results are extended to the case of inhomogeneous perturbing fields and confirmed by an exact analysis of the non-linear response of the spherical p-spin model.
publi.pdf JChemPhys_132_054501.pdf