Contact solitons as spin pistons in one-dimensional ferromagnetic channels

被引：3

作者：

Estiphanos, Medhanie ^{[1
]}

Iacocca, Ezio ^{[1
]}

机构：

[1] Univ Colorado, Ctr Magnetism & Magnet Nanostruct, Colorado Springs, CO 80918 USA

来源：

PHYSICAL REVIEW B | 2024年 / 110卷 / 17期

关键词：

TRANSPORT;

D O I：

10.1103/PhysRevB.110.174424

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 pump magnons along a ferromagnetic channel via dissipative exchange flows.

引用

页数：7

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