Resumé
Originalsprog | Udefineret/Ukendt |
---|---|
Tidsskrift | EPL |
Vol/bind | 71 |
Udgave nummer | 4 |
Sider (fra-til) | 646-650 |
ISSN | 0295-5075 |
DOI | |
Status | Udgivet - 2005 |
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A model for the generic alpha relaxation in viscous liquids. / Dyre, Jeppe.
I: EPL, Bind 71, Nr. 4, 2005, s. 646-650.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review
TY - JOUR
T1 - A model for the generic alpha relaxation in viscous liquids
AU - Dyre, Jeppe
PY - 2005
Y1 - 2005
N2 - Dielectric measurements on molecular liquids just above the glass transition indicate that alpha relaxation is characterized by a generic high-frequency loss varying as one over square root of frequency, whereas deviations from this come from one or more low-lying beta processes [Olsen et al., Phys. Rev. Lett., 86 (2001) 1271]. Assuming that long-wavelength fluctuations dominate the dynamics, a model for the dielectric alpha relaxation based on the simplest coupling between the density and dipole density fields is proposed here. The model, which is solved in second-order perturbation theory in the Gaussian approximation, reproduces the generic features of alpha relaxation.
AB - Dielectric measurements on molecular liquids just above the glass transition indicate that alpha relaxation is characterized by a generic high-frequency loss varying as one over square root of frequency, whereas deviations from this come from one or more low-lying beta processes [Olsen et al., Phys. Rev. Lett., 86 (2001) 1271]. Assuming that long-wavelength fluctuations dominate the dynamics, a model for the dielectric alpha relaxation based on the simplest coupling between the density and dipole density fields is proposed here. The model, which is solved in second-order perturbation theory in the Gaussian approximation, reproduces the generic features of alpha relaxation.
U2 - 10.1209/epl/i2005-10122-3
DO - 10.1209/epl/i2005-10122-3
M3 - Tidsskriftartikel
VL - 71
SP - 646
EP - 650
JO - EPL
JF - EPL
SN - 0295-5075
IS - 4
ER -