Magnon Landau-Zener tunnelling and spin current generation by electric field
arxiv(2024)
摘要
To control the magnon transport in magnetic systems is of great interest in
magnonics. Due to the feasibility of electric field, how to generate and
manipulate magnon with pure electrical method is one of the most desired goals.
Here we propose that the magnon spin current is generated by applying
time-dependent electric field, where the coupling between the magnon and
electric field is invoked via Aharonov-Casher effect. In particular, the magnon
spin current is dominated by electric field component which perpendicular to
the magnetization direction. We apply our theory to 1D ferromagnetic SSH model
and show that the generated magnon spin current is closely related to the band
geometry. Our findings expands the horizons of magnonics and
electric-control-magnon mechanisms.
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