Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2010-11-19
Phys. Rev. Lett. 106, 060603 (2011)
Physics
Condensed Matter
Soft Condensed Matter
4 pages, 4 postscript figures, with additional 3 pages and 5 postscript figures of supplementary material
Scientific paper
We use molecular dynamics simulations to study the driven phases of particles such as vortices or colloids moving over a decagonal quasiperiodic substrate. In the regime where the pinned states have quasicrystalline ordering, the driven phases can order into moving square or smectic states, or into states with aligned rows of both square and triangular tiling which we term dynamically induced Archimedean-like tiling. We show that when the angle of the drive is varied with respect to the substrate, directional locking effects occur where the particle motion locks to certain angles. It is at these locking angles that the dynamically induced Archimedean tiling appears. We also demonstrate that the different dynamical orderings and locking phases show pronounced changes as a function of filling fraction.
Olson Reichhardt C. J.
Reichhardt Charles
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