Soliton motion in skyrmion chains: Stabilization and guidance by nanoengineered pinning

Author(s)

Vizarim, N. P. ; Souza, J. C. Bellizotti ; Reichhardt, C. J. O. ; Reichhardt, C. ; Milosevic, M. V. ; Venegas, P. A.

• Document type: Journal article
• Source: PHYSICAL REVIEW B; v. 105, n. 22, p. 12-pg., 2022-06-16.

Abstract

Using a particle-based model we examine the depinning motion of solitons in skyrmion chains in quasi -onedimensional (1D) and two-dimensional (2D) systems containing embedded 1D interfaces. The solitons take the form of a particle or hole in a commensurate chain of skyrmions. Under an applied drive, just above a critical depinning threshold, the soliton moves with a skyrmion Hall angle of zero. For higher drives, the entire chain depins, and in a 2D system we observe that both the solitons and chain move at zero skyrmion Hall angle and then transition to a finite skyrmion Hall angle as the drive increases. In a 2D system with a 1D interface that is at an angle to the driving direction, there can be a reversal of the sign of the skyrmion Hall angle from positive to negative. Our results suggest that solitons in skyrmion systems could be used as information carriers in racetrack geometries that would avoid the drawbacks of finite skyrmion Hall angles. The soliton states become mobile at significantly lower drives than the depinning transition of the skyrmion chains themselves. (AU)

• FAPESP's process: 21/04941-0 - Dynamic behavior of Skyrmions in infinite Chiral Films in the presence of periodic Pinning potentials at zero temperature
• Grantee: José Carlos Bellizotti Souza
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• FAPESP's process: 17/20976-3 - Dynamic behavior of skyrmions under the influence of periodic pinning in chiral magnetic infinite thin films
• Grantee: Nicolas Porto Vizarim
• Support Opportunities: Scholarships in Brazil - Doctorate