Journal Article

FZJ-2021-04887

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png In-plane magnetic field-driven symmetry breaking in topological insulator-based three-terminal junctions

Kölzer, J. (Corresponding author)FZJ* ; Moors, K.FZJ* ; Jalil, A. R.FZJ* ; Zimmermann, E.FZJ* ; Rosenbach, D. ; Kibkalo, L.FZJ* ; Schüffelgen, P.FZJ* ; Mussler, G.FZJ* ; Grützmacher, D.FZJ* ; Schmidt, T. L. ; Lüth, H.FZJ* ; Schäpers, T. (Corresponding author)FZJ*

2021
Springer Nature London

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Please use a persistent id in citations: http://hdl.handle.net/2128/29394  doi:10.1038/s43246-021-00213-3

Abstract: 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 steeringpattern 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 oftransport in three-dimensional topological insulator nanoribbon-based junctions and circuits, acting as a topoelectric current switch.

Keyword(s): Information and Communication (1st) ; Condensed Matter Physics (2nd)

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (PGI-9)
2. Physik Nanoskaliger Systeme (ER-C-1)

Research Program(s):

1. 5222 - Exploratory Qubits (POF4-522) (POF4-522)

Appears in the scientific report 2021

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Database coverage:
; ; ; ; ; ; Article Processing Charges ; Clarivate Analytics Master Journal List ; DOAJ Seal ; Emerging Sources Citation Index ; Fees ; IF >= 5 ; JCR ; SCOPUS ; Web of Science Core Collection

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