Details
| Original language | English |
|---|---|
| Article number | 133116 |
| Journal | Applied physics letters |
| Volume | 91 |
| Issue number | 13 |
| Publication status | Published - 5 Oct 2007 |
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.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physics and Astronomy (miscellaneous)
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In: Applied physics letters, Vol. 91, No. 13, 133116, 05.10.2007.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Coupling in concentric double quantum rings
AU - Mühle, A.
AU - Wegscheider, W.
AU - Haug, R. J.
N1 - Funding information: We acknowledge financial support by BMBF via nanoQUIT.
PY - 2007/10/5
Y1 - 2007/10/5
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=34848857885&partnerID=8YFLogxK
U2 - 10.1063/1.2790828
DO - 10.1063/1.2790828
M3 - Article
AN - SCOPUS:34848857885
VL - 91
JO - Applied physics letters
JF - Applied physics letters
SN - 0003-6951
IS - 13
M1 - 133116
ER -