skip to main content
Idioma:

Magnus induced diode effect for skyrmions in channels with periodic potentials

Bellizotti Souza, J C ; Vizarim, N P ; Reichhardt, C J O ; Reichhardt, C ; Venegas, P A

Journal of physics. Condensed matter, 2023-01, Vol.35 (1), p.15804 [Periódico revisado por pares]

IOP Publishing

Texto completo disponível

Citações Citado por
  • Título:
    Magnus induced diode effect for skyrmions in channels with periodic potentials
  • Autor: Bellizotti Souza, J C ; Vizarim, N P ; Reichhardt, C J O ; Reichhardt, C ; Venegas, P A
  • Assuntos: diode ; Magnus ; periodic potentials ; skyrmions
  • É parte de: Journal of physics. Condensed matter, 2023-01, Vol.35 (1), p.15804
  • Notas: JPCM-121043.R1
    ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
  • Descrição: Abstract Using a particle based model, we investigate the skyrmion dynamical behavior in a channel where the upper wall contains divots of one depth and the lower wall contains divots of a different depth. Under an applied driving force, skyrmions in the channels move with a finite skyrmion Hall angle that deflects them toward the upper wall for − x direction driving and the lower wall for + x direction driving. When the upper divots have zero height, the skyrmions are deflected against the flat upper wall for − x direction driving and the skyrmion velocity depends linearly on the drive. For + x direction driving, the skyrmions are pushed against the lower divots and become trapped, giving reduced velocities and a nonlinear velocity-force response. When there are shallow divots on the upper wall and deep divots on the lower wall, skyrmions get trapped for both driving directions; however, due to the divot depth difference, skyrmions move more easily under − x direction driving, and become strongly trapped for + x direction driving. The preferred − x direction motion produces what we call a Magnus diode effect since it vanishes in the limit of zero Magnus force, unlike the diode effects observed for asymmetric sawtooth potentials. We show that the transport curves can exhibit a series of jumps or dips, negative differential conductivity, and reentrant pinning due to collective trapping events. We also discuss how our results relate to recent continuum modeling on a similar skyrmion diode system.
  • Editor: IOP Publishing
  • Idioma: Inglês
Voltar para lista de resultados

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.