title: Local Magnetic Suppression of Topological Surface States in Bi2Te3 Nanowires.
abstract: 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.
authors.affiliation: Institute of Nanostructure and Solid State Physics, Universität Hamburg , Jungiusstrasse 11 B, 20355 Hamburg, Germany.|IBM Research-Zurich , Säumerstrasse 4, 8803 Rüschlikon, Switzerland.
authors.forename: Johannes
authors.initials: J
authors.lastname: Gooth
authors.affiliation: Institute of Nanostructure and Solid State Physics, Universität Hamburg , Jungiusstrasse 11 B, 20355 Hamburg, Germany.
authors.forename: Robert
authors.initials: R
authors.lastname: Zierold
authors.affiliation: Institute of Nanostructure and Solid State Physics, Universität Hamburg , Jungiusstrasse 11 B, 20355 Hamburg, Germany.
authors.forename: Philip
authors.initials: P
authors.lastname: Sergelius
authors.affiliation: Institute of Nanostructure and Solid State Physics, Universität Hamburg , Jungiusstrasse 11 B, 20355 Hamburg, Germany.
authors.forename: Bacel
authors.initials: B
authors.lastname: Hamdou
authors.affiliation: Institute for Metallic Materials, IFW Dresden , Helmholtzstrasse 20, 01069 Dresden, Germany.
authors.forename: Javier
authors.initials: J
authors.lastname: Garcia
authors.affiliation: Institute for Metallic Materials, IFW Dresden , Helmholtzstrasse 20, 01069 Dresden, Germany.
authors.forename: Christine
authors.initials: C
authors.lastname: Damm
authors.affiliation: Institute for Metallic Materials, IFW Dresden , Helmholtzstrasse 20, 01069 Dresden, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Rellinghaus
authors.affiliation: Division of Solid State Physics and NanoLund, Lund University , Box 118, 22100 Lund, Sweden.|Center for Applied Mathematics and Physics, Halmstad University , Box 823, 30118 Halmstad, Sweden.
authors.forename: Håkan Jan
authors.initials: HJ
authors.lastname: Pettersson
authors.affiliation: Department of Physics and Electrical Engineering, Linnaeus University , 39182 Kalmar, Sweden.
authors.forename: Anna
authors.initials: A
authors.lastname: Pertsova
authors.affiliation: Department of Physics and Electrical Engineering, Linnaeus University , 39182 Kalmar, Sweden.
authors.forename: Carlo
authors.initials: C
authors.lastname: Canali
authors.affiliation: IBM Research-Zurich , Säumerstrasse 4, 8803 Rüschlikon, Switzerland.
authors.forename: Mattias
authors.initials: M
authors.lastname: Borg
authors.affiliation: Institute of Nanostructure and Solid State Physics, Universität Hamburg , Jungiusstrasse 11 B, 20355 Hamburg, Germany.|Institute for Metallic Materials, IFW Dresden , Helmholtzstrasse 20, 01069 Dresden, Germany.
authors.forename: Kornelius
authors.initials: K
authors.lastname: Nielsch
keywords: 1D confinement; magnetism; nanowire; surface; topological insulator