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Aharonov-Bohm oscillations of a tunable quantum ring

U. F. Keyser·S. Borck·R. J. Haug·W. Wegscheider·M. Bichler·G. Abstreiter
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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.

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U. F. Keyser, S. Borck, R. J. Haug, W. Wegscheider, M. Bichler, G. Abstreiter. 2002-02-22. Aharonov-Bohm oscillations of a tunable quantum ring. https://doi.org/10.1088/0268-1242%2F17%2F5%2F103

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