Dynamics of particle flips in two-dimensional quasicrystals
arXiv:1006.1836 · doi:10.1103/PhysRevB.82.134206
Abstract
The dynamics of quasicrystals is more complicated than the dynamics of periodic solids and difficult to study in experiments. Here, we investigate a decagonal and a dodecagonal quasicrystal using molecular dynamics simulations of the Lennard-Jones-Gauss interaction system. We observe that the short time dynamics is dominated by stochastic particle motion, so-called phason flips, which can be either single-particle jumps or correlated ring-like multi-particle moves. Over long times, the flip mechanism is efficient in reordering the quasicrystals and can generate diffusion. The temperature dependence of diffusion is described by an Arrhenius law. We also study the spatial distribution and correlation of mobile particles by analyzing the dynamic propensity.
10 pages, 14 figures
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Cited by in corpus (14)
- Phase Diagram of Hard Tetrahedra
- Growth modes of quasicrystals
- Formation of dodecagonal quasicrystals in two-dimensional systems of patchy particles
- Non-Close-Packed Three-Dimensional Quasicrystals
- Confirmation of the random tiling hypothesis for a decagonal quasicrystal
- Local growth of icosahedral quasicrystalline tilings
- Entropic Stabilization of Tunable Planar Modulated Superstructures
- Atomic diffusion due to hyperatomic fluctuation for quasicrystals
- Stabilizing quasicrystals composed of patchy colloids by narrowing the patch width
- Formation and Fluctuation of Two-dimensional Dodecagonal Quasicrystal
- Atomistic mechanisms of dynamics in a two-dimensional dodecagonal quasicrystal
- Tuning the Stability of a Model Quasicrystal and its Approximants with a Periodic Substrate
- Event-chain Monte Carlo simulations of the liquid to solid transition of two-dimensional decagonal colloidal quasicrystals
- Formation of a single quasicrystal upon collision of multiple grains