Journal Article

FZJ-2021-01053

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Flux periodic oscillations and phase-coherent transport in GeTe nanowire-based devices

Zhang, J. ; Tse, P.-L. ; Jalil, A.-R.FZJ* ; Kölzer, J.FZJ* ; Rosenbach, D.FZJ* ; Luysberg, M.FZJ* ; Panaitov, G.FZJ* ; Lüth, H.FZJ* ; Hu, Z. ; Grützmacher, D.FZJ* ; Lu, J. G. ; Schäpers, T. (Corresponding author)FZJ*

2021
Nature Publishing Group UK [London]

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Please use a persistent id in citations: http://hdl.handle.net/2128/27215  doi:10.1038/s41467-021-21042-5

Abstract: Despite the fact that GeTe is known to be a very interesting material for applications in thermoelectrics and for phase-change memories, the knowledge on its low-temperature transport properties is only limited. We report on phase-coherent phenomena in the magnetotransport of GeTe nanowires. From universal conductance fluctuations measured on GeTe nanowires with Au contacts, a phase-coherence length of about 280 nm at 0.5 K is determined. The distinct phase-coherence is confirmed by the observation of Aharonov–Bohm type oscillations for parallel magnetic fields. We interpret the occurrence of these magnetic flux-periodic oscillations by the formation of a tubular hole accumulation layer. For Nb/GeTe-nanowire/Nb Josephson junctions we obtained a critical current of 0.2 μA at 0.4 K. By applying a perpendicular magnetic field the critical current decreases monotonously with increasing field, whereas in a parallel field the critical current oscillates with a period of the magnetic flux quantum confirming the presence of a tubular hole channel.

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Contributing Institute(s):

1. Bioelektronik (IBI-3)

Research Program(s):

1. 524 - Molecular and Cellular Information Processing (POF4-524) (POF4-524)

Appears in the scientific report 2021

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