The role of cluster dynamics in the -relaxation of supercooled liquidsV. Halpern
Department of Physics, Bar-Ilan University - Ramat-Gan, 52900, Israel
(Received 19 March 2004; accepted in final form 17 May 2004)
The effect is considered of molecules leaving a cluster, within which their dielectric -relaxation is described by a stretched exponential function . It is shown that an increase in their rate of leaving can lead to the relaxation of the system's polarization being described by a stretched exponential function with a stretching exponent larger than and a relaxation time smaller than . The implications of this for time-temperature superposition and other properties of supercooled liquids are discussed.
77.22.Gm - Dielectric loss and relaxation.
© EDP Sciences 2004