Details
| Original language | English |
|---|---|
| Pages (from-to) | 1246-1248 |
| Number of pages | 3 |
| Journal | Physica E: Low-Dimensional Systems and Nanostructures |
| Volume | 40 |
| Issue number | 5 |
| Publication status | Published - 1 Mar 2008 |
Abstract
We present measurements done on a novel device consisting of two concentric quantum rings realized by local anodic oxidation in a GaAs/AlGaAs heterostructure. The outer ring is connected to external leads while the inner ring is only Coulomb-coupled to the rest of the system. We studied the electronic transport through the outer ring in dependence of an external magnetic field and found a superposition of oscillations with two distinct Aharonov-Bohm periods in the signal. These matched the diameters of the outer and inner ring respectively, demonstrating an influence of the inner ring on the conductance of the outer one. We attribute this influence to charge redistributions in the inner ring induced by the magnetic field.
Keywords
- Aharonov-Bohm effect, Quantum rings
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physica E: Low-Dimensional Systems and Nanostructures, Vol. 40, No. 5, 01.03.2008, p. 1246-1248.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Coulomb-coupled concentric quantum rings
AU - Mühle, A.
AU - Wegscheider, W.
AU - Haug, R. J.
N1 - Funding information: We acknowledge support from BMBF via nanoQUIT.
PY - 2008/3/1
Y1 - 2008/3/1
N2 - We present measurements done on a novel device consisting of two concentric quantum rings realized by local anodic oxidation in a GaAs/AlGaAs heterostructure. The outer ring is connected to external leads while the inner ring is only Coulomb-coupled to the rest of the system. We studied the electronic transport through the outer ring in dependence of an external magnetic field and found a superposition of oscillations with two distinct Aharonov-Bohm periods in the signal. These matched the diameters of the outer and inner ring respectively, demonstrating an influence of the inner ring on the conductance of the outer one. We attribute this influence to charge redistributions in the inner ring induced by the magnetic field.
AB - We present measurements done on a novel device consisting of two concentric quantum rings realized by local anodic oxidation in a GaAs/AlGaAs heterostructure. The outer ring is connected to external leads while the inner ring is only Coulomb-coupled to the rest of the system. We studied the electronic transport through the outer ring in dependence of an external magnetic field and found a superposition of oscillations with two distinct Aharonov-Bohm periods in the signal. These matched the diameters of the outer and inner ring respectively, demonstrating an influence of the inner ring on the conductance of the outer one. We attribute this influence to charge redistributions in the inner ring induced by the magnetic field.
KW - Aharonov-Bohm effect
KW - Quantum rings
UR - http://www.scopus.com/inward/record.url?scp=39649094280&partnerID=8YFLogxK
U2 - 10.1016/j.physe.2007.08.095
DO - 10.1016/j.physe.2007.08.095
M3 - Article
AN - SCOPUS:39649094280
VL - 40
SP - 1246
EP - 1248
JO - Physica E: Low-Dimensional Systems and Nanostructures
JF - Physica E: Low-Dimensional Systems and Nanostructures
SN - 1386-9477
IS - 5
ER -