TY  - JOUR
AU  - Gül, Önder
AU  - Demarina, Nataliya
AU  - Blömers, C.
AU  - Rieger, T.
AU  - Lüth, H.
AU  - Lepsa, M. I.
AU  - Grützmacher, D.
AU  - Schäpers, Th.
TI  - Flux periodic magnetoconductance oscillations in GaAs/InAs core/shell nanowires
JO  - Physical review / B
VL  - 89
IS  - 4
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - FZJ-2014-00939
SP  - 045417
PY  - 2014
AB  - Magnetotransport experiments on epitaxial GaAs/InAs core/shell nanowires are performed in which the InAs shell forms a tube-like conductive channel around the highly resistive GaAs core. The core/shell nanowires are grown by molecular beam epitaxy. It is found that the nanowire conductance oscillates with the magnetic field oriented parallel to its axis, with a period of the magnetic flux quantum ϕ0=h/e. Related to that, it is shown that the electronic transport is mediated by closed loop quantum states encircling the wire axis rather than by electron interference of partial waves. By means of a gate voltage the conductance at zero magnetic field can be changed between an oscillation minimum and maximum. The experimental findings are supported by numerical calculations.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000332225400009
DO  - DOI:10.1103/PhysRevB.89.045417
UR  - https://juser.fz-juelich.de/record/150904
ER  -