Dresden 2009 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 40: Quasicrystals I

MM 40.1: Vortrag

Donnerstag, 26. März 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.