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@ARTICLE{Haas:826175,
author = {Haas, Fabian and Zellekens, Patrick and Lepsa, Mihail Ion
and Rieger, Torsten and Grützmacher, Detlev and Lüth, Hans
and Schäpers, Thomas},
title = {{E}lectron {I}nterference in {H}all {E}ffect {M}easurements
on {G}a{A}s/{I}n{A}s {C}ore/{S}hell {N}anowires},
journal = {Nano letters},
volume = {17},
number = {1},
issn = {1530-6992},
address = {Washington, DC},
publisher = {ACS Publ.},
reportid = {FZJ-2017-00421},
pages = {128 - 135},
year = {2017},
abstract = {We present low-temperature magnetotransport measurements on
GaAs/InAs core/shell nanowires contacted by regular
source–drain leads as well as laterally attached Hall
contacts, which only touch parts of the nanowire sidewalls.
Low-temperature measurements between source and drain
contacts show typical phase coherent effects, such as
universal conductance fluctuations in a magnetic field
aligned perpendicularly to the nanowire axis as well as
Aharonov–Bohm-type oscillations in a parallel aligned
magnetic field. However, the signal between the Hall
contacts shows a Hall voltage buildup, when the magnetic
field is turned perpendicular to the nanowire axis while
current is driven through the wire using the source–drain
contacts. At low temperatures, the phase coherent effects
measured between source and drain leads are superimposed on
the Hall voltage, which can be explained by nonlocal probing
of large segments of the nanowire. In addition, the
Aharonov–Bohm-type oscillations are also observed in the
magnetoconductance at magnetic fields aligned parallel to
the nanowire axis, using the laterally contacted leads. This
measurement geometry hereby directly corresponds to
classical Aharonov–Bohm experiments using planar quantum
rings. In addition, the Hall voltage is used to characterize
the nanowires in terms of charge carrier concentration and
mobility, using temperature- and gate-dependent measurements
as well as measurements in tilted magnetic fields. The
GaAs/InAs core/shell nanowire used in combination with
laterally attached contacts is therefore the ideal system to
three-dimensionally combine quantum ring experiments using
the cross-sectional plane and Hall experiments using the
axial nanowire plane.},
cin = {PGI-9 / JARA-FIT},
ddc = {540},
cid = {I:(DE-Juel1)PGI-9-20110106 / $I:(DE-82)080009_20140620$},
pnm = {521 - Controlling Electron Charge-Based Phenomena
(POF3-521)},
pid = {G:(DE-HGF)POF3-521},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000392036600019},
doi = {10.1021/acs.nanolett.6b03611},
url = {https://juser.fz-juelich.de/record/826175},
}