Chaotic dynamics in spin-vortex pairs
A.V. Bondarenko, E. Holmgren, Z.W. Li, B.A. Ivanov, V. Korenivski
TL;DR
This paper investigates the non-linear dynamics of spin-vortex pairs at low temperatures, revealing how chaos influences core decoupling and reduces variability in switching times.
Contribution
It uncovers the resonant and chaotic behaviors in spin-vortex pair dynamics and maps the parameter space where these effects occur.
Findings
Chaos enhances core decoupling resonance.
Chaos reduces switching time variability by up to two orders of magnitude.
Identifies parameter regions activating different core-core dynamic mechanisms.
Abstract
We report on spin-vortex pair dynamics measured at temperatures low enough to suppress stochastic core motion, thereby uncovering the highly non-linear intrinsic dynamics of the system. Our analysis shows that the decoupling of the two vortex cores is resonant and can be enhanced by dynamic chaos. We detail the regions of the relevant parameter space, in which the various mechanisms of the resonant core-core dynamics are activated. We show that the presence of chaos can reduce the thermally-induced spread in the switching time by up to two orders of magnitude.
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