Methyl group dynamics in glassy systems: Crossover from quantum to classical regime - art. no. 060201

Authors
Moreno, AJ Alegria, A Colmenero, J
Citation
Aj. Moreno et al., Methyl group dynamics in glassy systems: Crossover from quantum to classical regime - art. no. 060201, PHYS REV B, 6305(6), 2001, pp. 0201
Citations number
20
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6305
Issue
6
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010201)6305:6<0201:MGDIGS>2.0.ZU;2-M
Abstract
The problem of the crossover from quantum to classical dynamics for methyl group rotation in glassy systems is tackled in a quantitative way. A barrie r distribution model, which was previously introduced to explain the neutro n-scattering spectra in the low- and high-temperature limits, is extended n ow to the whole temperature range without introducing additional fitting pa rameters and it is checked in poly(vinyl acetate) with excellent results.