Twisted light-induced spin-spin interaction in a chiral helimagnet

Yutaro Goto; Hajime Ishihara; Nobuhiko Yokoshi

doi:10.1088/1367-2630/abf613

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arXiv · 2101.10131

Twisted light-induced spin-spin interaction in a chiral helimagnet

Yutaro Goto·Hajime Ishihara·Nobuhiko Yokoshi

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Abstract

We theoretically investigate how the orbital angular momentum of light can affect a chiral magnetic order. Here, we consider a metallic chiral helimagnet, which is under stationary radiation of a resonant optical vortex beam. We propose a novel interaction between local spins considering microscopic interactions between an optical vortex and electrons. This vortex-induced interaction modulates the chiral magnetic order in an entirely different way than an external magnetic field does. Our spin modulation technique may pave a route to create a unique topological or chiral structure for future opto-spintronics devices.

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Yutaro Goto, Hajime Ishihara, Nobuhiko Yokoshi. 2021-01-20. Twisted light-induced spin-spin interaction in a chiral helimagnet. https://doi.org/10.1088/1367-2630%2Fabf613

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