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- W2768616049 abstract "We analyze the coupling of elastic lattice deformations to the magnon degrees of freedom of magnon Dirac materials. For a Honeycomb ferromagnet we find that, as it happens in the case of graphene, elastic gauge fields appear coupled to the magnon pseudospinors. For deformations that induce constant pseudomagnetic fields, the spectrum around the Dirac nodes splits into pseudoLandau levels. We show that when a Dzyaloshinskii-Moriya interaction is considered, a topological gap opens in the system and a Chern-Simons effective action for the elastic degrees of freedom is generated. Such a term encodes a phonon Hall viscosity response, entirely generated by fluctuations of magnons living in the vicinity of the Dirac points. The magnon Hall viscosity vanishes at zero temperature, and grows as temperature is raised and the states around the Dirac points are increasingly populated." @default.
- W2768616049 created "2017-12-04" @default.
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- W2768616049 date "2018-02-05" @default.
- W2768616049 modified "2023-10-03" @default.
- W2768616049 title "Elastic gauge fields and Hall viscosity of Dirac magnons" @default.
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- W2768616049 doi "https://doi.org/10.1103/physrevb.97.054404" @default.
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