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arXiv · 1711.10082

Spin-wave propagation in the presence of inhomogeneous Dzyaloshinskii-Moriya interactions

Seung-Jae Lee·Jung-Hwan Moon·Hyun-Woo Lee·Kyung-Jin Lee
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Abstract

We theoretically investigate spin-wave propagation through a magnetic metamaterial with spatially modulated Dzyaloshinskii-Moriya interaction. We establish an effective Sch{ö}dinger equation for spin-waves and derive boundary conditions for spin-waves passing through the boundary between two regions having different Dzyaloshinskii-Moriya interactions. Based on these boundary conditions, we find that the spin-wave can be amplified at the boundary and the spin-wave bandgap is tunable either by an external magnetic field or the strength of Dzyaloshinskii-Moriya interaction, which offers a spin-wave analogue of the field-effect transistor in traditional electronics.

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Seung-Jae Lee, Jung-Hwan Moon, Hyun-Woo Lee, Kyung-Jin Lee. 2017-11-28. Spin-wave propagation in the presence of inhomogeneous Dzyaloshinskii-Moriya interactions. https://doi.org/10.1103/physrevb.96.184433

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