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Oscillatory persistent currents in self-assembled quantum rings

AuthorsKleemans, N. A. J. M.; Bominaar-Silkens, I. M. A.; Fomin, V. M.; Gladilin, V. N.; Granados, Daniel ; Taboada, Alfonso G.; García Martínez, Jorge Manuel ; Offermans, P.; Zeitler, U.; Christianen, P. C. M.; Maan, J. C.; Devreese, J. T.; Koenraad, P. M.
KeywordsGallium arsenide
III-V semiconductors
Indium compounds
Magnetic moments
Nanostructured materials
Persistent currents
Scanning tunnelling microscopy
Semiconductor quantum dots
Issue Date5-Oct-2007
PublisherAmerican Physical Society
CitationPhysics Review Letters 99, 146808 (2007)
AbstractWe 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.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.99.146808
Appears in Collections:(IMN-CNM) Artículos
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