title: Oscillatory persistent currents in self-assembled quantum rings.
abstract: 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.
authors.affiliation: PSN, COBRA, Eindhoven University of Technology, The Netherlands.
authors.forename: N A J M
authors.initials: NA
authors.lastname: Kleemans
authors.forename: I M A
authors.initials: IM
authors.lastname: Bominaar-Silkens
authors.forename: V M
authors.initials: VM
authors.lastname: Fomin
authors.forename: V N
authors.initials: VN
authors.lastname: Gladilin
authors.forename: D
authors.initials: D
authors.lastname: Granados
authors.forename: A G
authors.initials: AG
authors.lastname: Taboada
authors.forename: J M
authors.initials: JM
authors.lastname: García
authors.forename: P
authors.initials: P
authors.lastname: Offermans
authors.forename: U
authors.initials: U
authors.lastname: Zeitler
authors.forename: P C M
authors.initials: PC
authors.lastname: Christianen
authors.forename: J C
authors.initials: JC
authors.lastname: Maan
authors.forename: J T
authors.initials: JT
authors.lastname: Devreese
authors.forename: P M
authors.initials: PM
authors.lastname: Koenraad