Oscillatory persistent currents in self-assembled quantum rings.
We report the direct measurement of the persistent current carried by a single electron by means of magnetization experiments on self-assembled InAs/GaAs quantum rings. We measured the first Aharonov-Bohm oscillation at a field of 14 T, in perfect agreement with our model based on the structural properties determined by cross-sectional scanning tunneling microscopy measurements. The observed oscillation magnitude of the magnetic moment per electron is remarkably large for the topology of our nanostructures, which are singly connected and exhibit a pronounced shape asymmetry.
Kleemans
N A J M
NA
PSN, COBRA, Eindhoven University of Technology, The Netherlands.
Bominaar-Silkens
I M A
IM
Fomin
V M
VM
Gladilin
V N
VN
Granados
D
D
Taboada
A G
AG
García
J M
JM
Offermans
P
P
Zeitler
U
U
Christianen
P C M
PC
Maan
J C
JC
Devreese
J T
JT
Koenraad
P M
PM