Oscillatory persistent currents in self-assembled quantum rings

N.A.J.M. Kleemans, I.M.A. Bominaar-Silkens, V. Fomin, V.N. Gladilin, D. Granados, A.G. Taboada, J.M. Garcia, P. Offermans, U. Zeitler, P.C.M. Christianen, J.C. Maan, J.T. Devreese, P.M. Koenraad

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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. [on SciFinder (R)]
Original languageEnglish
Pages (from-to)146808-1/4
JournalPhysical Review Letters
Volume99
Issue number14
DOIs
Publication statusPublished - 2007

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