Conference Presentation (After Call)

FZJ-2026-01382

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Quasi-Ballistic Transport in Phase-Pure GaAs/InAs Core/Shell Nanowires

Basaric, F. (Corresponding author)FZJ* ; Brajovic, V.FZJ* ; Behner, G. ; Moors, K.FZJ* ; Schaarman, W. ; Juluri, R. ; Sanchez, A. M. ; Lüth, H.FZJ* ; Grützmacher, D.FZJ* ; Pawlis, A.FZJ* ; Schäpers, T.FZJ*

2025

Abstract: Core/shell GaAs/InAs nanowires represent tubular conductors due to their insulating core and confined conducting states in the InAs shell. We investigate nanowires with a crystalline phase purity of the InAs shell, where reduced scattering in electronic transport is expected. Low-temperature gate-dependent transport measurements give us insight into different contributions to the oscillatory behavior in the magnetoconductance, as well as the possibility to probe non-local transport phenomena due to large phase coherence length. With temperature-dependent measurements, we resolved the quasi-ballistic transport regime, and estimate the phase coherence length. Both measurements indicate superior transport properties of phase-pure GaAs/InAs nanowires in contrast to previous reports on non-phase pure nanowires. Our findings are an important optimization step for further development of nanowire-based hybrid devices.

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

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (PGI-9)
2. JARA Institut Green IT (PGI-10)

Research Program(s):

1. 5222 - Exploratory Qubits (POF4-522) (POF4-522)
2. DFG project G:(GEPRIS)390534769 - EXC 2004: Materie und Licht für Quanteninformation (ML4Q) (390534769) (390534769)

Appears in the scientific report 2025

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