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Magnon Dirac materials
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Institute for Materials Science, Los Alamos, USA.
Number of Authors: 3
2016 (English)In: Physical Review B, ISSN 2469-9950, E-ISSN 2469-9969, 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
2016. Vol. 94, no 7, 075401
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-134277DOI: 10.1103/PhysRevB.94.075401ISI: 000380951300004OAI: oai:DiVA.org:su-134277DiVA: diva2:1033397
Available from: 2016-10-06 Created: 2016-10-03 Last updated: 2017-11-30Bibliographically approved

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Balatsky, Alexander V.
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