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

Seung Jae Lee, Jung Hwan Moon, Hyun Woo Lee, Kyoung Jin Lee

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


We theoretically investigate spin-wave propagation through a magnetic metamaterial with spatially modulated Dzyaloshinskii-Moriya interaction. We establish an effective Schrödinger 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 band gap is tunable either by an external magnetic field or the strength of Dzyaloshinskii-Moriya interaction, which offers a spin-wave analog of the field-effect transistor in traditional electronics.

Original languageEnglish
Article number184433
JournalPhysical Review B
Issue number18
Publication statusPublished - 2017 Nov 27

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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