Coupling in concentric double quantum rings
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Original version
Mühle, A.; Wegscheider, W.; Haug, R.J.: Coupling in concentric double quantum rings. In: Applied Physics Letters 91 (2007), Nr. 13, 133116. DOI:
https://doi.org/10.1063/1.2790828
Repository version
To cite the version in the repository, please use this identifier:
https://doi.org/10.15488/2833
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Abstract:
We designed a device consisting of two concentric quantum rings in a GaAsAlGaAs heterostructure. The outer ring is connected to leads while the inner ring is only capacitively coupled to the rest of the system. Measuring electronic transport in a regime with strong coupling to the leads we found that the conductivity not only shows an Aharonov-Bohm effect with a periodicity fitting to the diameter of the outer ring but also another component matching the inner ring. This can be explained by magnetic-field dependent charge redistributions in the inner ring which affect the outer ring via Coulomb interaction. © 2007 American Institute of Physics.
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Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Publication type:
Article
Publishing status:
publishedVersion
Publication date:
2007
Keywords english:
Charge distribution
,
Coulomb interactions
,
Electric conductivity
,
Magnetic fields
,
Quantum theory
,
Semiconducting gallium
,
Aharonov-Bohm effect
,
Component matching
,
Concentric double quantum rings
,
Electronic transport
,
Heterojunctions
DDC:
530 | Physik
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