Aharonov-Bohm oscillations of a tunable quantum ring
arXiv:cond-mat/0202403 · doi:10.1088/0268-1242/17/5/103
Abstract
With an atomic force microscope a ring geometry with self-aligned in-plane gates was directly written into a GaAs/AlGaAs-heterostructure. Transport measurements in the open regime show only one transmitting mode and Aharonov-Bohm oscillations with more than 50% modulation are observed in the conductance. The tuning via in-plane gates allows to study the Aharonov-Bohm effect in the whole range from the open ring to the Coulomb-blockade regime.
3 pages, 3 figures