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Local Magnetic Suppression of Topological Surface States in Bi2Te3 Nanowires
University of Hamburg, Germany ; IBM Research-Zurich, Switzerland.
University of Hamburg, Germany.
University of Hamburg, Germany.
University of Hamburg, Germany.
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2016 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 10, no 7, p. 7180-7188Article 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.

Place, publisher, year, edition, pages
2016. Vol. 10, no 7, p. 7180-7188
Keyword [en]
1D confinement, magnetism, nanowire, surface, topological insulator
National Category
Condensed Matter Physics Atom and Molecular Physics and Optics
Research subject
Natural Science, Physics
Identifiers
URN: urn:nbn:se:lnu:diva-56093DOI: 10.1021/acsnano.6b03537ISI: 000380576600085PubMedID: 27351276Scopus ID: 2-s2.0-84979873036OAI: oai:DiVA.org:lnu-56093DiVA: diva2:971339
Available from: 2016-09-16 Created: 2016-08-31 Last updated: 2017-11-21Bibliographically approved

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Pertsova, AnnaCanali, Carlo M.

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