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arXiv · 2401.12022

Chiral-Damping-Enhanced Magnon Transmission

Xiyin Ye·Ke Xia·Gerrit E. W. Bauer·Tao Yu
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Abstract

The inevitable Gilbert damping in magnetization dynamics is usually regarded as detrimental to spin transport. Here we apply a general feature of chiral non-Hermitian dynamics to a ferromagnetic-insulator--normal-metal heterostructure to show that the strong momentum dependence and chirality of the eddy-current-induced damping also causes beneficial scattering properties: A potential barrier that reflects magnon wave packets becomes unidirectionally transparent in the presence of a metallic cap layer. Passive magnon gates that turn presumably harmful dissipation into useful functionalities should be useful for future quantum magnonic devices.

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Xiyin Ye, Ke Xia, Gerrit E. W. Bauer, Tao Yu. 2024-01-22. Chiral-Damping-Enhanced Magnon Transmission. https://arxiv.org/abs/2401.12022

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