Non-Equilibrium Phenomena in Supercooled Fluids, Glasses and Amorphous Materials

Dipole-dipole correlations and the Debye process in the dielectric response of non-associating glass forming liquids

“…The hallmarks of glassy dynamics are sometimes characterized by the so-called "three nons", 1 which refer to the non-Arrhenius temperature dependence of characteristic time constants, the non-exponential time dependence of the structural relaxation and the non-linear behavior in response to small temperature changes. [2][3][4][5][6] Despite decades of research and various proposed theories, no consensus about the origin of these features has been reached up to now. Concerning the spectral shape of the α-relaxation, which is the focus of the present paper, previous studies have tried to point out scaling relations [7][8][9] or otherwise common features of the line shape.…”