Topological Spin Excitations in Honeycomb Ferromagnet CrI3

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dc.citation.articleNumber041028en_US
dc.citation.issueNumber4en_US
dc.citation.journalTitlePhysical Review Xen_US
dc.citation.volumeNumber8en_US
dc.contributor.authorChen, Lebingen_US
dc.contributor.authorChung, Jae-Hoen_US
dc.contributor.authorGao, Binen_US
dc.contributor.authorChen, Tongen_US
dc.contributor.authorStone, Matthew B.en_US
dc.contributor.authorKolesnikov, Alexander I.en_US
dc.contributor.authorHuang, Qingzhenen_US
dc.contributor.authorDai, Pengchengen_US
dc.date.accessioned2019-01-09T17:21:10Zen_US
dc.date.available2019-01-09T17:21:10Zen_US
dc.date.issued2018en_US
dc.description.abstractIn two-dimensional honeycomb ferromagnets, bosonic magnon quasiparticles (spin waves) may either behave as massless Dirac fermions or form topologically protected edge states. The key ingredient defining their nature is the next-nearest-neighbor Dzyaloshinskii-Moriya interaction that breaks the inversion symmetry of the lattice and discriminates chirality of the associated spin-wave excitations. Using inelastic neutron scattering, we find that spin waves of the insulating honeycomb ferromagnet CrI3 (TC=61 K) have two distinctive bands of ferromagnetic excitations separated by a ∼4 meV gap at the Dirac points. These results can only be understood by considering a Heisenberg Hamiltonian with Dzyaloshinskii-Moriya interaction, thus providing experimental evidence that spin waves in CrI3 can have robust topological properties potentially useful for dissipationless spintronic applications.en_US
dc.identifier.citationChen, Lebing, Chung, Jae-Ho, Gao, Bin, et al.. "Topological Spin Excitations in Honeycomb Ferromagnet CrI3." <i>Physical Review X,</i> 8, no. 4 (2018) American Physical Society: https://doi.org/10.1103/PhysRevX.8.041028.en_US
dc.identifier.digitalPhysRevX.8.041028en_US
dc.identifier.doihttps://doi.org/10.1103/PhysRevX.8.041028en_US
dc.identifier.urihttps://hdl.handle.net/1911/105023en_US
dc.language.isoengen_US
dc.publisherAmerican Physical Societyen_US
dc.rightsPublished by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleTopological Spin Excitations in Honeycomb Ferromagnet CrI3en_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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