2011/03/15 by C. Reichhardt, C Reichhardt, C. J. Olson Reichhardt +1
Materials Science · Physics and Astronomy · #Colloid #Colloidal particle #Flow (mathematics) #Lattice (music) #Material Dynamics and Properties #Micro and Nano Robotics #Particle (ecology) #Pickering emulsions and particle stabilization #Square (algebra) #Square lattice #Superconductivity #Vortex #cond-mat.soft #cond-mat.supr-con
paper · pdf · doi:10.1088/0953-8984/24/22/225702
published as J. Phys.: Condens. Matter 24, 225702 (2012) · 28 pages, 23 postscript figures
arxiv created 2011/03/15 · openalex publication_date 2012/05/04 · arxiv updated 2015/05/27 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We examine collective dynamical locking effects for superconducting vortices and colloids interacting with square and triangular substrate arrays under a slowly rotated dc drive. A rich variety of lattice configurations associated with a series of steps in the velocity-force curves occur during the locking transitions. These include triangular, square, smectic, and disordered particle arrangements that can be identified using the structure factor. We show that the step widths vary with the ratio of the number of particles to the number of pinning sites. Unlike a static system, where matching effects occur at simple integer commensuration ratios, we find dynamical commensuration effects that arise when an integer number of particle chains flow between rows of pins. We identify two distinct types of locking as a function of substrate strength, distinguished by whether the particles flow along or between the pinning rows.