| Texto completo | |
| Autor(es): |
Bellizotti Souza, J. C.
;
Reichhardt, C. J. O.
;
Reichhardt, C.
;
Vizarim, N. P.
;
Venegas, P. A.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF PHYSICS-CONDENSED MATTER; v. 37, n. 27, p. 19-pg., 2025-07-07. |
| Resumo | |
Using both atomistic and particle-based simulations, we investigate the current-driven dynamics of skyrmions on two-dimensional periodic substrates when there are multiple skyrmions per substrate minimum. At zero drive, the system forms pinned skyrmion molecular crystal states consisting of dimers, trimers, or dimer-trimer mixtures that have both positional and orientational order. On a square substrate lattice, the motion above depinning occurs via a running soliton that travels completely transverse to the applied current. This motion is generated by a torque from the Magnus force, which rotates the n-mer states perpendicular to the applied current. At higher drives, the flow becomes disordered while the Hall angle diminishes and gradually approaches the intrinsic value. In some cases, we also find directional locking where the Hall angle becomes locked to certain symmetry directions of the substrate over a range of currents. The transitions into and out of directionally locked states are accompanied by negative differential mobility in which the net velocity decreases as the drive increases. On a triangular substrate, we find no transverse mobility effects, but still observe directionally locked motion. (AU) | |
| Processo FAPESP: | 24/02941-1 - Controle de texturas magnéticas interagindo com defeitos visando aplicações em spintrônica |
| Beneficiário: | Pablo Antonio Venegas Urenda |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 24/13248-5 - Comportamento de texturas topológicas magnéticas interagindo com interfaces visando controle e estabilidade para aplicações em spintrônica |
| Beneficiário: | Nicolas Porto Vizarim |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 22/14053-8 - Estudo do Comportamento de Skrymions em Materiais Magnéticos na Presença de Defeitos |
| Beneficiário: | José Carlos Bellizotti Souza |
| Modalidade de apoio: | Bolsas no Brasil - Mestrado |
| Processo FAPESP: | 23/17545-1 - Comportamento Dinâmico de Skyrmions em Materiais Magnéticos Interagindo com Defeitos Anisotrópicos |
| Beneficiário: | José Carlos Bellizotti Souza |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Mestrado |