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arXiv · 2407.02628

Contact solitons as spin pistons in one-dimensional ferromagnetic channels

Medhanie Estiphanos·Ezio Iacocca
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Abstract

Ferromagnetic channels subject to spin injection have been theoretically shown to sustain dissipative exchange flows (DEFs). In the strong injection regime, a soliton is stabilized at the injection site, which has been termed a contact soliton DEF or CS-DEF. Here, we investigate the modulation of CS-DEFs as a mechanism to inject magnons into a DEF. By varying the injection current, the parameters connecting the soliton with the DEF via a boundary layer are varied. These lead to a modification in the DEF which is interpreted as a spin piston. The injected magnons follow the expected dispersion relation of DEFs, akin to the Bogoliubov - de Gennes dispersion relation. This work demonstrates that changes in the injected current can pumping magnons along a ferromagnetic channel via dissipative exchange flows.

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Medhanie Estiphanos, Ezio Iacocca. 2024-07-02. Contact solitons as spin pistons in one-dimensional ferromagnetic channels. https://doi.org/10.1103/physrevb.110.174424

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