Keyser, U. F. and Borck, S. and Haug, R. J. and Abstreiter, Gerhard and Bichler, Max and Wegscheider, Werner (2002) Aharonov–Bohm oscillations of a tuneable quantum ring. Semiconductor Science and Technology 17 (5), L22-L24.
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Using 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 one to study the Aharonov–Bohm effect in the whole range from the open ring to the Coulomb-blockade regime.
|Institutions:||Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||07 Dec 2009 13:07|
|Last Modified:||20 Jul 2011 22:10|