A dynamic disorder model is developed to describe the random changes of a local structure due to the environment rearrangements. The picture incorporates in a simple way both ''local'' and ''cooperative'' features of the structural relaxation. If applied to the spin relaxation of a two-level system, the model accounts for the crossover between the homogeneous and the heterogeneous relaxation which is usually found in disordered systems. A good agreement with recent NMR results on the rotational dynamics in supercooled fluids is found.
|Autori interni:||LEPORINI, DINO|
|Autori:||Donati C; Leporini D; Mancini S|
|Titolo:||Spin relaxation driven by dynamic disorder|
|Anno del prodotto:||1996|
|Digital Object Identifier (DOI):||10.1016/0375-9601(96)00645-7|
|Appare nelle tipologie:||1.1 Articolo in rivista|