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- W4387667595 abstract "When a magnon passes through two-dimensional magnetic textures, it will experience a fictitious magnetic field originating from the 3×3 skew-symmetric gauge fields. To date, only one of the three independent components of the gauge fields has been found to play a role in generating the fictitious magnetic field, while the other two are perfectly hidden. In this Letter, we show that they are concealed in the nonlinear magnon transport in magnetic textures. Without loss of generality, we theoretically study the nonlinear magnon-skyrmion interaction in antiferromagnets. By analyzing the scattering features of three-magnon processes between the circularly polarized incident magnon and breathing skyrmion, we predict a giant Hall angle of both the confluence and splitting modes. Furthermore, we find that the Hall angle reverses its sign when one switches the handedness of the incident magnons. We dub this the nonlinear topological magnon spin Hall effect. Our findings are deeply rooted in the bosonic nature of magnons that the particle number is not conserved, which has no counterpart in low-energy fermionic systems and may open the door for probing gauge fields by nonlinear means.Received 9 January 2023Revised 3 April 2023Accepted 15 September 2023DOI:https://doi.org/10.1103/PhysRevLett.131.166704© 2023 American Physical SocietyPhysics Subject Headings (PhySH)Research AreasMagnonsSkyrmionsSpin Hall effectTopological Hall effectPhysical SystemsAntiferromagnetsMagnetic thin filmsNoncollinear magnetsTechniquesMethods in magnetismCondensed Matter, Materials & Applied Physics" @default.
- W4387667595 created "2023-10-17" @default.
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- W4387667595 date "2023-10-16" @default.
- W4387667595 modified "2023-10-17" @default.
- W4387667595 title "Nonlinear Topological Magnon Spin Hall Effect" @default.
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- W4387667595 doi "https://doi.org/10.1103/physrevlett.131.166704" @default.
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