SOME CONSEQUENCES OF THE ALPHA BETA BIFURCATION OF RELAXATIONS IN SUPERCOOLED LIQUIDS/

Citation
Xc. Zeng et al., SOME CONSEQUENCES OF THE ALPHA BETA BIFURCATION OF RELAXATIONS IN SUPERCOOLED LIQUIDS/, Journal of non-crystalline solids, 172, 1994, pp. 61-68
Citations number
33
Categorie Soggetti
Material Science, Ceramics
ISSN journal
00223093
Volume
172
Year of publication
1994
Part
1
Pages
61 - 68
Database
ISI
SICI code
0022-3093(1994)172:<61:SCOTAB>2.0.ZU;2-S
Abstract
Because it is a doubly projected quantity and is related to correlatio n functions of gradients of the intermolecular potential, the normaliz ed second memory function corresponding to the relaxation of a dynamic al quantity A(t) is taken to be a relaxation function dependent only u pon collective modes and independent of the specific nature of the var iable A(t). From this assumption alone the relaxation properties of ma ny variables A(t) can be obtained and a rationale for the generalized Stokes-Einstein relation can be given. Further, by assuming that this memory function is biexponential, many of the properties characteristi c of systems which exhibit bifurcation of their slow relaxations into alpha and 'slow beta' processes can be obtained.