Poster (After Call)

FZJ-2024-01230

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png In-plane magnetic field induced asymmetric magnetoconductance in topologicalinsulator kinks

Behner, G.FZJ* ; Jalil, A. R.FZJ* ; Moors, K.FZJ* ; Zimmermann, E.FZJ* ; Schüffelgen, P.FZJ* ; Grützmacher, D.FZJ* ; Schäpers, T.FZJ*

2023

Abstract: The study of the transport properties of quasi one-dimensional topological insulator (TI) nanostructuresunder the application of an in-plane magnetic field is crucial for the later realization oftopological quantum computation building blocks. We present low temperature measurements ofselectively grown TI-Kinks under the application of an in-plane magnetic field. A dependence of theTI-Kink’s resistance on the angle of the in-plane magnetic field is visible in the magnetotransportdata resulting in a π-periodic change of the conductance. This phenomenon originates from anorbital effect, leading to a alignment or misalignment of the phase-coherent states on the bottom andtop surface of the topological insulator. Respectively, the aligned and misaligned states leadto a increased or decreased conductance in the device. The measurement results are supportedtheoretically by the analysis of a surface Rashba-Dirac model and tight-binding simulations of aneffective 3-dimensional mode

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

Note: DFG Germany’s Excellence Strategy—Cluster of Excellence Matter and Light for Quantum Computing (ML4Q) EXC 2004/1—390534769

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (PGI-9)

Research Program(s):

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

Appears in the scientific report 2023

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