CiteULike: dchen's relaxation http://www.citeulike.org/user/dchen/tag/relaxation CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/1676860 <i>Journal of Applied Physics, Vol. 88, No. 6. (2000), pp. 3113-3157.</i><br /><br />The field of viscous liquid and glassy solid dynamics is reviewed by a process of posing the key questions that need to be answered, and then providing the best answers available to the authors and their advisors at this time. The subject is divided into four parts, three of them dealing with behavior in different domains of temperature with respect to the glass transition temperature, Tg, and a fourth dealing with "short time processes." The first part tackles the high temperature regime T>Tg, in which the system is ergodic and the evolution of the viscous liquid toward the condition at Tg is in focus. The second part deals with the regime T~Tg, where the system is nonergodic except for very long annealing times, hence has time-dependent properties (aging and annealing). The third part discusses behavior when the system is completely frozen with respect to the primary relaxation process but in which secondary processes, particularly those responsible for "superionic" conductivity, and dopart mobility in amorphous silicon, remain active. In the fourth part we focus on the behavior of the system at the crossover between the low frequency vibrational components of the molecular motion and its high frequency relaxational components, paying particular attention to very recent developments in the short time dielectric response and the high Q mechanical response. ©2000 American Institute of Physics. Relaxation in glassforming liquids and amorphous solids CA Angell KL Ngai GB Mckenna PF Mcmillan SW Martin doi:10.1063/1.1286035 Journal of Applied Physics, Vol. 88, No. 6. (2000), pp. 3113-3157. 2007-09-19T18:39:48-00:00 Journal of Applied Physics 88 6 3113 3157 AIP glass relaxation review http://www.citeulike.org/user/dchen/article/2582904 <i>Physical Review Letters, Vol. 82, No. 18. (3 May 1999), 3649.</i><br /><br />We report on the direct observation of stretched exponential relaxation in low-temperature monatomic Lennard-Jones systems which were cooled slowly from the liquid phase to form crystals with a large number of defects. We use the cage correlation function [E. Rabani; J. D. Gezelter; and B. J. Berne; J. Chem. Phys. 107 ; 6867 (1997)] which measures changes in atomic surroundings to observe the stretched exponential relaxations. We obtain a distribution of hopping rates assuming that the origin of the Kohlrausch-Williams-Watts law is from static disorder in the distribution of barrier heights. Direct Observation of Stretched-Exponential Relaxation in Low-Temperature Lennard-Jones Systems Using the Cage Correlation Function Eran Rabani Daniel Gezelter BJ Berne doi:10.1103/PhysRevLett.82.3649 Physical Review Letters, Vol. 82, No. 18. (3 May 1999), 3649. 2008-03-24T22:16:42-00:00 Physical Review Letters 82 18 3649 American Physical Society function relaxation review http://www.citeulike.org/user/dchen/article/2563522 <i>Physical Review Letters, Vol. 98, No. 2. (2007)</i><br /><br />We use molecular dynamics computer simulations to investigate the relaxation dynamics of a simple model for a colloidal gel at a low volume fraction. We find that due to the presence of the open spanning network this dynamics shows at low temperature a nontrivial dependence on the wave vector which is very different from the one observed in dense glass-forming liquids. At high wave vectors the relaxation is due to the fast cooperative motion of the branches of the gel network, whereas at low wave vectors the overall rearrangements of the heterogeneous structure produce the relaxation process. Length-Scale-Dependent Relaxation in Colloidal Gels Emanuela Del Gado Walter Kob doi:10.1103/PhysRevLett.98.028303 Physical Review Letters, Vol. 98, No. 2. (2007) 2008-03-19T17:19:20-00:00 Physical Review Letters 98 2 APS 2007 colloids gel relaxation simulation http://www.citeulike.org/user/dchen/article/1900631 <i>The Journal of Chemical Physics, Vol. 111, No. 12. (1999), pp. 5441-5454.</i><br /><br />Email Address: Relaxation dynamics and their spatial distribution in a two-dimensional glass-forming mixture Donna Perera Peter Harrowell The Journal of Chemical Physics, Vol. 111, No. 12. (1999), pp. 5441-5454. 2007-11-12T01:53:38-00:00 The Journal of Chemical Physics 111 12 5441 5454 AIP 2d glass relaxation