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Magnon Dirac materials
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA. Los Alamos, NM, United States.
2016 (English)In: Physical Review B, ISSN 2469-9950, Vol. 94, no 7, 075401Article in journal (Refereed) Published
Abstract [en]

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
American Physical Society , 2016. Vol. 94, no 7, 075401
Keyword [en]
Topological Insulators, Graphene, Fermions, Electrons, Surface
National Category
Physical Sciences
URN: urn:nbn:se:kth:diva-192405DOI: 10.1103/PhysRevB.94.075401ISI: 000380951300004ScopusID: 2-s2.0-84981294369OAI: diva2:968966
Swedish Research CouncilKnut and Alice Wallenberg FoundationSwedish Foundation for Strategic Research EU, FP7, Seventh Framework Programme, FP/2207-2013 DM-321031

QC 20160913

Available from: 2016-09-13 Created: 2016-09-12 Last updated: 2016-09-13Bibliographically approved

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Balatsky, Alexander V.
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