Parts | Days | Selection | Search | Downloads | Help
MM: Fachverband Metall- und Materialphysik
MM 40: Quasicrystals I
MM 40.1: Talk
Thursday, March 26, 2009, 10:15–10:30, IFW D
The hydrodynamic structure factor of quasicrystals — •Andreas Chatzopoulos and Hans-Rainer Trebin — Institut für Theoretische und Angewandte Physik, Universiät Stuttgart, Germany
A theory of the hydrodynamic structure factor of quasicrystals is developed
and exploited. Based on the hydrodynamic equations for icosahedral
quasicrystals we introduce the terms of dynamic correlation and response. For
a better understanding of phonon and phason dynamics in reciprocal space
we determine in a first step the hydrodynamic structure factor in one
dimension.
In three dimensions the anisotropic phasonic peak shapes of the static
structure factor are reproduced depending only on the ratio of the two phason
elastic constants[1].
Then we show the dynamic extension and illustrate the effect of frequency and
kinetic coefficient.
[1] M. de Boissieu et al. Physical Review Letters, 75(1): 89-92, 1995.