ISSN:
1434-6036
Keywords:
64.70.PK
;
05.70
;
75.40
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The influence of local and translation invariant memory effects on the critical dynamics of a model undergoing a continous structural phase transition from a disordered (T〉T c ) to an ordered distorted phase (T〉T c ) is studied by mode coupling theory above the critical temperatureT c . It is shown that besides the existence of critical slowing-down modes there also exists a central peak as a consequence of correlations of the critical modes, increasing with the critical exponent γ when approachingT c . The dependence of the central peak on the wavevector $$\vec q$$ , temperatureT and on the spatial dimensiond is investigated. Ford=3 a scenario withlocal long time memory correlations is compared with respect to its temperature and momentum dependence with a model using translation invariant long time memory correlations.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01309169
