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pro vyhledávání: '"Reichhardt C"'
We numerically study two-dimensional active nematics with periodic activity patterning. For stripes of activity, we observe a transition from two-dimensional to one-dimensional active turbulence as the maximum active force and distance between activi
Externí odkaz:
http://arxiv.org/abs/2409.15479
Autor:
Reichhardt, C., Reichhardt, C. J. O.
We show that a variety of non-monotonic ratchet effects can arise when mesophase pattern-forming systems, which exhibit anisotropic crystal, stripe, and bubble reigmes, are coupled to one-dimensional asymmetric substrates under ac driving. The ratche
Externí odkaz:
http://arxiv.org/abs/2409.04646
We compare the dynamical behavior of magnetic skyrmions interacting with square and triangular defect arrays just above commensuration using both an atomistic model and a particle-based model. Under an applied drive, the initial motion is a kink trav
Externí odkaz:
http://arxiv.org/abs/2409.03056
Autor:
Souza, J. C. Bellizotti, Vizarim, N. P., Reichhardt, C. J. O., Reichhardt, C., Venegas, P. A.
Using atomistic simulations, we investigate the dynamical behavior of magnetic skyrmions in dimer and trimer molecular crystal arrangements, as well as bipartite lattices at 3/2 and 5/2 fillings, under ac driving over a square array of anisotropy def
Externí odkaz:
http://arxiv.org/abs/2408.16111
We develop an approximate, analytical model for the velocity of defects in active nematics by combining recent results for the velocity of topological defects in nematic liquid crystals with the flow field generated from individual defects in active
Externí odkaz:
http://arxiv.org/abs/2408.04706
Autor:
Souza, J. C. Bellizotti, Vizarim, N. P., Reichhardt, C. J. O., Venegas, P. A., Reichhardt, C.
Using atomistic simulations, we show that new types of skyrmion states called skyrmion molecular crystals and skyrmion superlattices can be realized on triangular substrates when there are two or three skyrmions per substrate minimum. We find that as
Externí odkaz:
http://arxiv.org/abs/2407.20188
Autor:
Reichhardt, C., Reichhardt, C. J. O.
We numerically examine the depinning, sliding, and melting of commensurate and incommensurate Wigner crystals on two-dimensional hexagonal periodic substrates near fillings of 1/3, 1/2, and 2/3 to model the dynamics of generalized Wigner crystals in
Externí odkaz:
http://arxiv.org/abs/2406.15663
Autor:
Souza, J. C. Bellizotti, Vizarim, N. P., Reichhardt, C. J. O., Reichhardt, C., Venegas, P. A.
We use atomistic simulations to examine the sliding dynamics of a skyrmion in a two-dimensional system containing a periodic one-dimensional stripe pattern of variations between low and high values of the perpendicular magnetic anisotropy. The skyrmi
Externí odkaz:
http://arxiv.org/abs/2404.14612
We numerically investigate the effect of a periodic array of asymmetric obstacles in a two-dimensional active nematic. We find that activity in conjunction with the asymmetry leads to a ratchet effect or unidirectional flow of the fluid along the asy
Externí odkaz:
http://arxiv.org/abs/2403.13733
Autor:
Reichhardt, C., Reichhardt, C. J. O.
We examine the ordering, pinning, and dynamics of two-dimensional pattern forming systems interacting with a periodic one-dimensional substrate. In the absence of the substrate, particles with competing long-range repulsion and short-range attraction
Externí odkaz:
http://arxiv.org/abs/2402.18539