This article has an erratum: [erratum]

Europhys. Lett.
Volume 67, Number 3, August 2004
Page(s) 460 - 463
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 01 July 2004
Europhys. Lett., 67 (3), pp. 460-463 (2004)
DOI: 10.1209/epl/i2004-10073-1

The role of cluster dynamics in the ${\alpha}$-relaxation of supercooled liquids

V. 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 ${\alpha}$-relaxation is described by a stretched exponential function $p(t)=\exp[-(t/\tau_{0})^{\alpha}]$. 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 ${\alpha}$ and a relaxation time smaller than $\tau_{0}$. 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