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Dual nature of magnetic dopants and competing trends in topological insulators
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2016 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 7, 12027Article in journal (Refereed) Published
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Abstract [en]

Topological insulators interacting with magnetic impurities have been reported to host several unconventional effects. These phenomena are described within the framework of gapping Dirac quasiparticles due to broken time-reversal symmetry. However, the overwhelming majority of studies demonstrate the presence of a finite density of states near the Dirac point even once topological insulators become magnetic. Here, we map the response of topological states to magnetic impurities at the atomic scale. We demonstrate that magnetic order and gapless states can coexist. We show how this is the result of the delicate balance between two opposite trends, that is, gap opening and emergence of a Dirac node impurity band, both induced by the magnetic dopants. Our results evidence a more intricate and rich scenario with respect to the once generally assumed, showing how different electronic and magnetic states may be generated and controlled in this fascinating class of materials.

Place, publisher, year, edition, pages
2016. Vol. 7, 12027
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Physical Sciences
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URN: urn:nbn:se:kth:diva-190679DOI: 10.1038/ncomms12027ISI: 000379110000001PubMedID: 27345240Scopus ID: 2-s2.0-84976585702OAI: oai:DiVA.org:kth-190679DiVA: diva2:952997
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QC 20160816

Available from: 2016-08-16 Created: 2016-08-12 Last updated: 2016-08-16Bibliographically approved

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Barla, AlessandroBalatsky, Alexander V.
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Nordic Institute for Theoretical Physics NORDITA
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