Logarithmic Relaxation in Glass-Forming Systems

Simple item page
dc.creatorGotze, W.
dc.creatorSperl, M.
dc.date2002-05-14
dc.date.accessioned2026-07-07T02:45:28Z
dc.date.available2026-07-07T02:45:28Z
dc.descriptionWithin the mode-coupling theory for ideal glass transitions, an analysis for the correlation functions of glass-forming systems for states near higher-order glass-transition singularities is presented. It is shown that the solutions of the equations of motion can be asymptotically expanded in polynomials of the logarithm of time t. In leading order, an ln(t)-law is obtained, and the leading corrections are given by a fourth-order polynomial. The correlators interpolate between three scenarios. First, there are planes in parameter space where the dominant corrections to the ln(t)-law vanish, so that the logarithmic decay governs the structural relaxation process. Second, the dynamics due to the higher-order singularity can describe the initial and intermediate part of the alpha-process thereby reducing the range of validity of von Schweidler's law and leading to strong alpha-relaxation stretching. Third, the ln(t)-law can replace the critical decay law of the beta-process leading to a particularly large crossover interval between the end of the transient and the beginning of the alpha-process. This may lead to susceptibility spectra below the band of microscopic excitations exhibiting two peaks. Typical results of the theory are demonstrated for models dealing with one and two correlation functions.
dc.description17 pages, 10 figures, Phys. Rev. E, in press
dc.identifierhttps://arxiv.org/abs/cond-mat/0205289
dc.identifierhttp://arxiv.org/abs/cond-mat/0205289
dc.identifierPhys. Rev. E 66, 011405 (2002)
dc.identifierdoi:10.1103/PhysRevE.66.011405
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/19307
dc.subjectSoft Condensed Matter
dc.titleLogarithmic Relaxation in Glass-Forming Systems
dc.typetext

Files

Collections

arXiv