Reference : In-plane magnetic field-driven symmetry breaking in topological insulator-based three...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
In-plane magnetic field-driven symmetry breaking in topological insulator-based three-terminal junctions
Kölzer, Jonas []
Moors, Kristof []
Jalil, Abdur Rehman []
Zimmermann, Erik []
Rosenbach, Daniel []
Kibkalo, Lidia []
Schüffelgen, Peter []
Mussler, Gregor []
Grützmacher, Detlev []
Schmidt, Thomas mailto [University of Luxembourg > Faculty of Science, Technology and Medicine (FSTM) > Department of Physics and Materials Science (DPHYMS) >]
Lüth, Hans []
Schäpers, Thomas []
Communications Materials
Nature Research
Yes (verified by ORBilu)
United Kingdom
[en] Topological surface states of three-dimensional topological insulator nanoribbons and their distinct magnetoconductance properties are promising for topoelectronic applications and topological quantum computation. A crucial building block for nanoribbon-based circuits are three-terminal junctions. While the transport of topological surface states on a planar boundary is not directly affected by an in-plane magnetic field, the orbital effect cannot be neglected when the surface states are confined to the boundary of a nanoribbon geometry. Here, we report on the magnetotransport properties of such three-terminal junctions. We observe a dependence of the current on the in-plane magnetic field, with a distinct steering pattern of the surface state current towards a preferred output terminal for different magnetic field orientations. We demonstrate that this steering effect originates from the orbital effect, trapping the phase-coherent surface states in the different legs of the junction on opposite sides of the nanoribbon and breaking the left-right symmetry of the transmission across the junction. The reported magnetotransport properties demonstrate that an in-plane magnetic field is not only relevant but also very useful for the characterization and manipulation of transport in three-dimensional topological insulator nanoribbon-based junctions and circuits, acting as a topoelectric current switch.
Fonds National de la Recherche - FnR

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