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@ARTICLE{Dauber:877734,
author = {Dauber, Jan and Oellers, Martin and Venn, Florian and
Epping, Alexander and Watanabe, Kenji and Taniguchi, Takashi
and Hassler, Fabian and Stampfer, Christoph},
title = {{A}haronov-{B}ohm oscillations and magnetic focusing in
ballistic graphene rings},
journal = {Physical review / B},
volume = {96},
number = {20},
issn = {2469-9950},
address = {Woodbury, NY},
publisher = {Inst.},
reportid = {FZJ-2020-02432},
pages = {205407},
year = {2017},
abstract = {We present low-temperature magnetotransport measurements on
graphene rings encapsulated in hexagonal boron nitride. We
investigate phase-coherent transport and show Aharonov-Bohm
(AB) oscillations in quasiballistic graphene rings with hard
confinement. In particular, we report on the observation of
h/e,h/2e, and h/3e conductance oscillations. Moreover we
show signatures of magnetic focusing effects at small
magnetic fields confirming ballistic transport. We perform
tight-binding calculations which allow us to reproduce all
significant features of our experimental findings and enable
a deeper understanding of the underlying physics. Finally,
we report on the observation of the AB conductance
oscillations in the quantum Hall regime at reasonable high
magnetic fields, where we find regions with enhanced AB
oscillation visibility with values up to $0.7\%.$ These
oscillations are well explained by taking disorder into
account allowing for a coexistence of hard- and soft-wall
confinement.},
cin = {PGI-9 / JARA-FIT},
ddc = {530},
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},
pubmed = {pmid:29116592},
UT = {WOS:000414333700005},
doi = {10.1103/PhysRevB.96.205407},
url = {https://juser.fz-juelich.de/record/877734},
}