Title :
A random-walk model of non-linear structural dynamics in supercooled liquids
Author :
Arkhipov, Vladimir I. ; BÄssler, Heinz ; Khramtchenkov, Dmitry V.
Author_Institution :
Inst. of Phys. & Eng., Acad. of Sci., Moscow, Russia
Abstract :
The random-walk model of structural dynamics is used to account for long-range cooperative phenomena in supercooled liquids. Coupling of structural units within ordered regions is shown to cause narrowing of the distribution function for the energies of structural units. This approach allows one to explain the Kauzmann paradox and to fit non-Debye susceptibility spectra obtained on so-called fragile glasses. The results are in quantitative agreement with existing experimental data
Keywords :
dielectric liquids; dielectric losses; liquid structure; liquid theory; optical susceptibility; random processes; supercooling; Kauzmann paradox; dielectric loss; distribution function; fragile glasses; long-range cooperative phenomena; nonDebye susceptibility spectra; nonlinear structural dynamics; ordered regions; random-walk model; structural units; supercooled liquids; Distribution functions; Fluid dynamics; Glass; Kinetic theory; Liquids; Metastasis; Physics; Tail; Temperature dependence; Viscosity;
Conference_Titel :
Electrets, 1996. (ISE 9), 9th International Symposium on
Conference_Location :
Shanghai
Print_ISBN :
0-7803-2695-4
DOI :
10.1109/ISE.1996.578055
