Aharonov-Bohm oscillations of a tunable quantum ring

Details Aharonov-Bohm oscillations of a tunable quantum ring Aharonov-Bohm oscillations of a tunable quantum ring

2002-02-22

arxiv.org/abs/cond-mat/0202403v1

Semiconductor Science and Technology 17, L22-L24 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 3 figures

Scientific paper

10.1088/0268-1242/17/5/103

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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