Magnon Dirac materials
2016 (English)In: PHYSICAL REVIEW B, ISSN 2469-9950, Vol. 94, no 7, 075401Article in journal (Refereed) Published
We demonstrate how a Dirac-like magnon spectrum is generated for localized magnetic moments forming a two-dimensional honeycomb lattice. The Dirac crossing point is proven to be robust against magnon-magnon interactions, as these only shift the spectrum. Local defects induce impurity resonances near the Dirac point, as well as magnon Friedel oscillations. The energy of the Dirac point is controlled by the exchange coupling, and thus a two-dimensional array of magnetic dots is an experimentally feasible realization of Dirac magnons with tunable dispersion.
Place, publisher, year, edition, pages
2016. Vol. 94, no 7, 075401
IdentifiersURN: urn:nbn:se:uu:diva-303113DOI: 10.1103/PhysRevB.94.075401ISI: 000380951300004OAI: oai:DiVA.org:uu-303113DiVA: diva2:974909
FunderSwedish Research CouncilGöran Gustafsson Foundation for Research in Natural Sciences and MedicineKnut and Alice Wallenberg FoundationSwedish Foundation for Strategic Research EU, FP7, Seventh Framework Programme, FP/2207-2013, DM-321031