Abstract
Magnetic domain walls (DWs) function as a waveguide for low-energy magnons. In this paper we develop the theory for the nonlocal transport of these bound magnons through a ferromagnetic insulator (FMI) that are injected and detected electrically in adjacent normal metal leads by spin-flip scatting processes and the (inverse) spin-Hall effect. Our setup requires a twofold degeneracy of the magnetic ground state, which we realize by an easy axis and hard axis anisotropy, in the FMI. This is readily provided by a broad range of materials. The DW is a topologically protected feature of the system and we obtain the nonlocal spin transport through it, and thereby we provide a framework for reconfigureable magnonic devices.
Original language | English |
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Article number | 064434 |
Pages (from-to) | 1-10 |
Journal | Physical Review B |
Volume | 104 |
Issue number | 6 |
DOIs | |
Publication status | Published - 1 Aug 2021 |