23 citations · 48 across the 17 of their papers we have counts for
17 papers
Skyrmion behavior in attractive-repulsive square array of pinning centers
L. Basseto, N. P. Vizarim, J. C. Bellizotti Souza +1
We investigate the driven dynamics of a single skyrmion in a square lattice of mixed pinning sites, where attractive and repulsive defects coexist using a particle-based model. The…
Many-body skyrmion interactions in helimagnets
N. P. Vizarim, J. C. Bellizotti Souza, Raí M. Menezes +3
Many-body interactions strongly influence the structure, stability, and dynamics of condensed-matter systems, from atomic lattices to interacting quasi-particles such as supercondu…
Diode Effect for Skyrmions Interacting with Linear Protrusion Defects
J. C. Bellizotti Souza, C. J. O. Reichhardt, C. Reichhardt +2
We simulate collectively interacting skyrmions in a channel with periodic asymmetry, and find a strong diode effect for the skyrmion flow. There is also an asymmetry in the skyrmio…
Ordered and Disordered Skyrmion States on a Square Substrate
J. C. Bellizotti Souza, C. J. O. Reichhardt, C. Reichhardt +2
We examine the ordering of skyrmions interacting with a square substrate created from a modulation of anisotropy using atomistic simulations. We consider fillings of {\it f} = 1.5,…
Sliding Dynamics of Skyrmion Molecular Crystals
J. C. Bellizotti Souza, C. J. O. Reichhardt, C. Reichhardt +2
Using both atomistic and particle-based simulations, we investigate the current-driven dynamics of skyrmions on two-dimensional periodic substrates when there are multiple skyrmion…
Skyrmion-Skyrmionium Phase Separation and Laning Transitions via Spin-Orbit Torque Currents
N. P. Vizarim, J. C. Bellizotti Souza, C. J. O. Reichhardt +3
Many driven binary systems can exhibit laning transitions when the two species have different mobilities, such as colloidal particles with opposite charges in electric fields. Anot…
Topological Transitions, Pinning and Ratchets for Driven Magnetic Hopfions in Nanostructures
J. C. Bellizotti Souza, C. J. O. Reichhardt, C. Reichhardt +3
Using atomistic simulations, we examine the dynamics of three-dimensional magnetic hopfions interacting with an array of line defects or posts as a function of defect spacing, defe…
Skyrmionium Dynamics and Stability on One Dimensional Anisotropy Patterns
J. C. Bellizotti Souza, N. P. Vizarim, C. J. O. Reichhardt +2
We examine a skyrmionium driven over a periodic anisotropy pattern, which consists of disorder free regions and disordered regions. For small defect densities, the skyrmionium flow…
Comparing Dynamics, Pinning and Ratchet Effects for Skyrmionium, Skyrmions, and Antiskyrmions
J. C. Bellizotti Souza, N. P. Vizarim, C. J. O. Reichhardt +2
We compare the driven dynamics of skyrmions, antiskyrmions, and skyrmionium interacting with random disorder, circular defects, and asymmetric potentials. When interacting with a l…
Reversible to Irreversible Transitions for ac Driven Skyrmions on Periodic Substrates
J. C. Bellizotti Souza, N. P. Vizarim, C. J. O. Reichhardt +2
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 an…
Skyrmion Molecular Crystals and Superlattices on Triangular Substrates
J. C. Bellizotti Souza, N. P. Vizarim, C. J. O. Reichhardt +2
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 t…
Shapiro Steps and Stability of Skyrmions Interacting with Alternating Anisotropy Under the Influence of ac and dc Drives
J. C. Bellizotti Souza, N. P. Vizarim, C. J. O. Reichhardt +2
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 lo…
Controlled Skyrmion Ratchet in Linear Protrusion Defects
J. C. Bellizotti Souza, N. P. Vizarim, C. J. O. Reichhardt +2
Using atomistic simulations, we investigate the dynamical behavior of a single skyrmion interacting with an asymmetric linear protrusion array under external ac driving. When the a…
Skyrmion Transport and Annihilation in Funnel Geometries
F. S. Rocha, J. C. Bellizotti Souza, N. P. Vizarim +3
Using atomistic simulations, we have investigated the transport and annihilation of skyrmions interacting with a funnel array under a current applied perpendicular to the funnel ax…
Spontaneous Skyrmion Conformal Lattice and Transverse Motion During dc and ac Compression
J. C. Bellizotti Souza, N. P. Vizarim, C. J. O. Reichhardt +2
We use atomistic-based simulations to investigate the behavior of ferromagnetic skyrmions being continuously compressed against a rigid wall under dc and ac drives. The compressed…
Directional Locking and the Influence of Obstacle Density on Skyrmion Dynamics in Triangular and Honeycomb Arrays
N. P. Vizarim, J. C. Bellizotti Souza, C. Reichhardt +2
We numerically examine a single skyrmion dynamics under the influence of triangular and honeycomb obstacle arrays at zero temperature. The skyrmion Hall angle , that is the…
Skyrmion Dynamics and Topological Sorting on Periodic Obstacle Arrays
N. P. Vizarim, C. Reichhardt, C. J. O. Reichhardt +1
We examine skyrmions under a dc drive interacting with a square array of obstacles for varied obstacle size and damping. When the drive is applied in a fixed direction, we find tha…