TY  - JOUR
AU  - Haas, Fabian
AU  - Zellekens, Patrick
AU  - Wenz, Tobias
AU  - Demarina, Nataliya
AU  - Rieger, Torsten
AU  - Lepsa, Mihail Ion
AU  - Grützmacher, Detlev
AU  - Lüth, Hans
AU  - Schäpers, Thomas
TI  - Anisotropic phase coherence in GaAs/InAs core/shell nanowires
JO  - Nanotechnology
VL  - 28
IS  - 44
SN  - 1361-6528
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2017-08544
SP  - 445202 -
PY  - 2017
AB  - Low-temperature transport in nanowires is accompanied by phase-coherent effects, which are observed as modulation of the conductance in an external magnetic field. In the GaAs/InAs core/shell nanowires investigated here, these are h/e flux periodic oscillations in a magnetic field aligned parallel to the nanowire axis and aperiodic universal conductance fluctuations in a field aligned perpendicularly to the nanowire axis. Both electron interference effects are used to analyse the phase coherence of the system. Temperature-dependent measurements are carried out, in order to derive the phase coherence lengths in the cross-sectional plane as well as along the nanowire sidewalls. It is found that these values show a strong anisotropy, which can be explained by the crystal structure of the GaAs/InAs core/shell nanowire. For nanowires with a radius as low as 45 nm, flux periodic oscillations were observed up to a temperature of 55 K.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000412649600002
DO  - DOI:10.1088/1361-6528/aa887d
UR  - https://juser.fz-juelich.de/record/841500
ER  -