Issue |
Europhys. Lett.
Volume 35, Number 5, August II 1996
|
|
---|---|---|
Page(s) | 373 - 378 | |
Section | Condensed matter: structure, thermal and mechanical properties | |
DOI | https://doi.org/10.1209/epl/i1996-00122-9 | |
Published online | 01 September 2002 |
Critical dynamics of dipolar glasses
Institut für Theoretische Physik,
Georg-August-Universität, Bunsenstrasse 9, D-37073 Göttingen, Germany
Received:
22
April
1996
Accepted:
21
June
1996
We discuss the critical dynamics of dipolar glasses as observed in
the dynamic dielectric response and the dynamic structure factor.
Our analysis is based on a hydrodynamic model, generalized to
include slow (dipolar) fluctuations near the glass transition. The
critical slowing-down of the dipoles gives rise to anomalies in the
dynamic dielectric response, the appearance of a central peak and a
divergent sound damping. All three phenomena are interrelated and
determined by the critical exponents of an Ising spin glass. We work
out the consequences of a dynamic scaling hypothesis for the dipolar
autocorrelation and discuss two examples of such a scaling
function. One is calculated within mean-field theory and the other
is taken from numerical simulations. We compare our
results to recent experiments on .
PACS: 64.70.Pf – Glass transitions / 64.60.Ht – Dynamic critical phenomena
© EDP Sciences, 1996
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