TY - JOUR
T1 - The effect of cluster dynamics on the α-relaxation in supercooled liquids
AU - Halpern, V.
PY - 2005/9/15
Y1 - 2005/9/15
N2 - The dielectric relaxation in a supercooled liquid is analyzed in a model in which the liquid is composed of slowly moving molecules within clusters and fast ones between them. If the dielectric α-relaxation of molecules inside a cluster is described by a stretched exponential function then the cluster dynamics, with molecules leaving and entering the clusters, can lead to the relaxation of the system's polarization being described by a stretched exponential function with a larger stretching exponent, that depends on the rate at which the molecules leave the clusters. The implications of this for time-temperature superposition and other properties of supercooled liquids are discussed.
AB - The dielectric relaxation in a supercooled liquid is analyzed in a model in which the liquid is composed of slowly moving molecules within clusters and fast ones between them. If the dielectric α-relaxation of molecules inside a cluster is described by a stretched exponential function then the cluster dynamics, with molecules leaving and entering the clusters, can lead to the relaxation of the system's polarization being described by a stretched exponential function with a larger stretching exponent, that depends on the rate at which the molecules leave the clusters. The implications of this for time-temperature superposition and other properties of supercooled liquids are discussed.
UR - http://www.scopus.com/inward/record.url?scp=24344504451&partnerID=8YFLogxK
U2 - 10.1016/j.jnoncrysol.2005.03.054
DO - 10.1016/j.jnoncrysol.2005.03.054
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AN - SCOPUS:24344504451
SN - 0022-3093
VL - 351
SP - 2900
EP - 2904
JO - Journal of Non-Crystalline Solids
JF - Journal of Non-Crystalline Solids
IS - 33-36 SPEC. ISS.
ER -