Print Email Facebook Twitter Magnon dispersion in bilayers of two-dimensional ferromagnets Title Magnon dispersion in bilayers of two-dimensional ferromagnets Author Ortmanns, Lara C. (Kavli institute of nanoscience Delft; Chalmers University of Technology; Student TU Delft; Rheinisch-Westfälische Technische Hochschule) Bauer, G.E. (TU Delft QN/Bauer Group; Kavli institute of nanoscience Delft; Tohoku University) Blanter, Y.M. (TU Delft QN/Blanter Group; Kavli institute of nanoscience Delft) Date 2021 Abstract We determine magnon spectra of an atomic bilayer magnet with ferromagnetic intra- and both ferro- and antiferromagnetic interlayer coupling. Analytic expressions for the full magnon band of the latter case reveal that both exchange interactions govern the fundamental magnon gap. The inter- and intralayer magnetic ordering are not independent: a stronger ferromagnetic intralayer coupling effectively strengthens the antiferromagnetic interlayer coupling as we see from comparison of two bilayer systems. The trivial topology of these exchange-anisotropy spin models without spin-orbit interaction excludes a magnon thermal Hall effect. To reference this document use: http://resolver.tudelft.nl/uuid:78aee2b7-a2ab-4e34-b55c-49579c09802f DOI https://doi.org/10.1103/PhysRevB.103.155430 ISSN 2469-9950 Source Physical Review B, 103 (15) Part of collection Institutional Repository Document type journal article Rights © 2021 Lara C. Ortmanns, G.E. Bauer, Y.M. Blanter Files PDF PhysRevB.103.155430.pdf 1.06 MB Close viewer /islandora/object/uuid:78aee2b7-a2ab-4e34-b55c-49579c09802f/datastream/OBJ/view