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Local Magnetic Suppression of Topological Surface States in Bi2Te3 Nanowires
Institute of Nanostructure and Solid State Physics, Universität Hamburg, Hamburg, Germany & IBM Research-Zurich, Rüschlikon, Switzerland.
Institute of Nanostructure and Solid State Physics, Universität Hamburg, Hamburg, Germany.
Institute of Nanostructure and Solid State Physics, Universität Hamburg, Hamburg, Germany.
Institute of Nanostructure and Solid State Physics, Universität Hamburg, Hamburg, Germany.
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2016 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 10, no 7, 7180-7188 p.Article in journal (Refereed) Published
Abstract [en]

Locally induced, magnetic order on the surface of a topological insulator nanowire could enable room-temperature topological quantum devices. Here we report on the realization of selective magnetic control over topological surface states on a single facet of a rectangular Bi2Te3 nanowire via a magnetic insulating Fe3O4 substrate. Low-temperature magnetotransport studies provide evidence for local time-reversal symmetry breaking and for enhanced gapping of the interfacial 1D energy spectrum by perpendicular magnetic-field components, leaving the remaining nanowire facets unaffected. Our results open up great opportunities for development of dissipation-less electronics and spintronics. © 2016 American Chemical Society.

Place, publisher, year, edition, pages
Washington: American Chemical Society (ACS), 2016. Vol. 10, no 7, 7180-7188 p.
Keyword [en]
1D confinement, magnetism, nanowire, topological insulator
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:hh:diva-32771DOI: 10.1021/acsnano.6b03537ISI: 000380576600085PubMedID: 27351276Scopus ID: 2-s2.0-84979873036OAI: oai:DiVA.org:hh-32771DiVA: diva2:1058356
Available from: 2016-12-20 Created: 2016-12-20 Last updated: 2016-12-22Bibliographically approved

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