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
Zusammenfassung: |
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.
|
Lizenzbestimmungen: |
Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden. |
Publikationstyp: |
Article |
Publikationsstatus: |
publishedVersion |
Erstveröffentlichung: |
2007 |
Schlagwörter (englisch): |
Charge distribution, Coulomb interactions, Electric conductivity, Magnetic fields, Quantum theory, Semiconducting gallium, Aharonov-Bohm effect, Component matching, Concentric double quantum rings, Electronic transport, Heterojunctions
|
Fachliche Zuordnung (DDC): |
530 | Physik
|