Dzyaloshinskii-Moriya Induced Topological Magnon-Phonon Hybridization in 2D Antiferromagnetic Insulators with Tunable Chern Numbers

dc.creatorMa, Bowen
dc.creatorFiete, Gregory A.
dc.date.accessioned2024-02-05T13:50:50Z
dc.date.available2024-02-05T13:50:50Z
dc.date.issued2021-07-23
dc.description.abstractWe theoretically study magnon-phonon hybrid excitations (magnon-polarons) in two-dimensional antiferromagnets on a honeycomb lattice. With an in-plane Dzyaloshinskii-Moriya interaction (DMI) allowed from mirror symmetry breaking from phonons, we find non-trivial Berry curvature around the anti-crossing rings among magnon and both optical and acoustic phonon bands, which gives rise to finite Chern numbers. We show that the Chern numbers of the magnon-polaron bands can be manipulated by changing the magnetic field direction or strength. We evaluate the thermal Hall conductivity reflecting the non-trivial Berry curvatures of magnon-polarons and propose a valley Hall effect resulting from spin-induced chiral phonons as a possible experimental signature. Our study complements prior work on magnon-phonon hybridized systems without optical phonons and suggests possible applications in spin caloritronics with topological magnons and chiral phonons.
dc.description.departmentCenter for Dynamics and Control of Materials
dc.description.sponsorshipWe gratefully acknowledge support from NSF DMR-1949701 and NSF DMR-2114825, with additional support from the NSF through the Center for Dynamics and Control of Materi- als: an NSF MRSEC under Cooperative Agreement No. DMR-1720595. This work was performed in part at the Aspen Center for Physics, which is supported by National Science Foundation grant PHY-1607611.
dc.identifier.doihttps://doi.org/10.48550/arXiv.2107.11484
dc.identifier.urihttps://hdl.handle.net/2152/123576
dc.identifier.urihttps://doi.org/10.26153/tsw/50370
dc.language.isoen_US
dc.relation.ispartofCenter for Dynamics and Control of Materials Publications
dc.rights.restrictionOpen
dc.subjectDzyaloshinskii-Moriya
dc.titleDzyaloshinskii-Moriya Induced Topological Magnon-Phonon Hybridization in 2D Antiferromagnetic Insulators with Tunable Chern Numbers
dc.typeArticle

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