TY  - JOUR
AU  - Zhang, Jinzhong
AU  - Tse, Pok-Lam
AU  - Jalil, Abdur-Rehman
AU  - Kölzer, Jonas
AU  - Rosenbach, Daniel
AU  - Luysberg, Martina
AU  - Panaitov, Gregory
AU  - Lüth, Hans
AU  - Hu, Zhigao
AU  - Grützmacher, Detlev
AU  - Lu, Jia Grace
AU  - Schäpers, Thomas
TI  - Flux periodic oscillations and phase-coherent transport in GeTe nanowire-based devices
JO  - Nature Communications
VL  - 12
IS  - 1
SN  - 2041-1723
CY  - [London]
PB  - Nature Publishing Group UK
M1  - FZJ-2021-01053
SP  - 754
PY  - 2021
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - 33531502
UR  - <Go to ISI:>//WOS:000617063000024
DO  - DOI:10.1038/s41467-021-21042-5
UR  - https://juser.fz-juelich.de/record/890587
ER  -