Mühle, A. and Wegscheider, Werner and Haug, Rolf J. (2008) Quantum dots formed in a GaAs/AlGaAs quantum ring. Applied Physics Letters 92 (1), 013126.
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We demonstrate the tunability of a GaAs/AlGaAs quantum ring showing coherent Aharonov-Bohm oscillations up to a gate voltage regime where the ring splits into three quantum dots. This is explained based on the structure's special confinement potential. We characterized the dots by analyzing the corresponding sets of Coulomb blockade lines. Additionally, the spatial configuration of the dots was confirmed by charge measurements using an adjacent quantum point contact.
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|Date:||10 January 2008|
|Institutions:||Physics > Institute of Experimental and Applied Physics > Retired Professors > Group Werner Wegscheider|
|Keywords:||Aharonov-Bohm effect, aluminium compounds, Coulomb blockade, gallium arsenide, III-V semiconductors, quantum point contacts, semiconductor quantum dots|
|Subjects:||500 Science > 530 Physics|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||01 Feb 2010 13:10|
|Last Modified:||13 Mar 2014 12:48|