Journal Article

FZJ-2016-02530

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Angle-dependent magnetotransport in GaAs/InAs core/shell nanowires

Haas, F. (Corresponding author)FZJ* ; Wenz, T. ; Zellekens, P.FZJ* ; Demarina, N.FZJ* ; Rieger, T.FZJ* ; Lepsa, M. I.FZJ* ; Grützmacher, D.FZJ* ; Lüth, H.FZJ* ; Schäpers, T. (Corresponding author)FZJ*

2016
Nature Publishing Group London

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Please use a persistent id in citations: http://hdl.handle.net/2128/11193  doi:10.1038/srep24573

Abstract: We study the impact of the direction of magnetic flux on the electron motion in GaAs/InAs core/shell nanowires. At small tilt angles, when the magnetic field is aligned nearly parallel to the nanowire axis, we observe Aharonov–Bohm type h/e flux periodic magnetoconductance oscillations. These are attributed to transport via angular momentum states, formed by electron waves within the InAs shell. With increasing tilt of the nanowire in the magnetic field, the flux periodic magnetoconductance oscillations disappear. Universal conductance fluctuations are observed for all tilt angles, however with increasing amplitudes for large tilt angles. We record this evolution of the electron propagation from a circling motion around the core to a diffusive transport through scattering loops and give explanations for the observed different transport regimes separated by the magnetic field orientation.

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Contributing Institute(s):

1. Halbleiter-Nanoelektronik (PGI-9)

Research Program(s):

1. 521 - Controlling Electron Charge-Based Phenomena (POF3-521) (POF3-521)

Appears in the scientific report 2016

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