Magnon dynamics in a Skyrmion-textured domain wall of antiferromagnets

Abstract

We theoretically investigate the interaction between magnons and a Skyrmion-textured domain wall in a two-dimensional antiferromagnet and elucidate the resultant properties of magnon transport. Using supersymmetric quantum mechanics, we solve the scattering problem of magnons on top of the domain wall and obtain the exact solutions of propagating and bound magnon modes. Then, we find their properties of reflection and refraction in the Skyrmion-textured domain wall, where magnons experience an emergent magnetic field due to its non-trivial spin texture-induced effective gauge field. Based on the obtained scattering properties of magnons and the domain wall, we show that the thermal transport decreases as the domain wall's chirality increases. Our results suggest that the thermal transport of an antiferromagnet is tunable by modulating the Skyrmion charge density of the domain wall, which might be useful for realizing electrically tunable spin caloritronic devices.

13 pages, 5 figures

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Cited by in corpus (9)

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• Spin Statistics and Surgeries of Topological Solitons in QCD Matter in Magnetic Field
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• Domain Wall Networks as Skyrmion Crystals in Chiral Magnets
• Creation of domain-wall Skyrmions in chiral magnets
• Magnetic D-brane solitons: skyrmion strings ending on a Néel wall in chiral magnets
• SUSY partners and $S$-matrix poles of the one dimensional Rosen-Morse II Hamiltonian
• Creation of domain-wall skyrmions in chiral magnets with Landau-Lifshitz-Gilbert dynamics and demagnetization