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Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
Published on: February 22, 2018
Dynamical ordering and directional locking for particles moving over quasicrystalline substrates
C Reichhardt1, C J Olson Reichhardt
1Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Physical Review Letters
|March 17, 2011
Summary
Particle behavior on quasiperiodic substrates was studied using molecular dynamics simulations. Driven particle phases exhibit unique ordering and directional locking, forming dynamically induced Archimedean-like tiling at specific angles.
Area of Science:
- Physics
- Materials Science
- Complex Systems
Background:
- Particles like vortices and colloids interact with substrates.
- Quasiperiodic substrates exhibit unique ordering properties.
- Particle dynamics on complex surfaces are not fully understood.
Purpose of the Study:
- Investigate particle phases driven over a decagonal quasiperiodic substrate.
- Characterize the ordering and dynamics of driven particles.
- Explore directional locking effects and their relation to substrate geometry.
Main Methods:
- Molecular dynamics simulations were employed.
- Simulations focused on driven particle phases (vortices, colloids).
- Particle motion over a decagonal quasiperiodic substrate was analyzed.
Main Results:
- Driven phases ordered into moving square, smectic, or dynamically induced Archimedean-like tiling.
- Directional locking effects were observed when varying drive angle.
- Dynamically induced Archimedean tiling appeared at specific locking angles.
- Dynamical orderings and locking phases changed with filling fraction.
Conclusions:
- Quasiperiodic substrates induce complex ordering in driven particle systems.
- Directional locking is a key phenomenon influencing particle phase formation.
- Dynamically induced Archimedean tiling represents a novel ordered state.
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