Fano effect in a quantum-ring-quantum-dot system with tunable coupling
(2006) In Physical Review B (Condensed Matter and Materials Physics) 73(20).- Abstract
- Transport measurements are presented on a quantum ring that is tunnel-coupled to a quantum dot. When the dot is in the Coulomb blockade regime, but strongly coupled to the open ring, Fano line shapes are observed in the current through the ring, when the electron number in the dot changes by 1. The symmetry of the Fano resonances is found to depend on the magnetic flux penetrating the area of the ring and on the strength of the ring-dot coupling. At temperatures above T=0.65 K the Fano effect disappears, while the Aharonov-Bohm interference in the ring persists up to T=4.2 K. Good agreement is found between these experimental observations and a single-channel scattering matrix model including decoherence in the dot.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/407351
- author
- Fuhrer, Andreas LU ; Brusheim, Patrik LU ; Ihn, T ; Sigrist, M ; Ensslin, K ; Wegscheider, W and Bichler, M
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 73
- issue
- 20
- article number
- 205326
- publisher
- American Physical Society
- external identifiers
-
- wos:000237950500062
- scopus:33646557688
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.73.205326
- language
- English
- LU publication?
- yes
- id
- 999254a6-3a9d-4292-9f0f-73c4f90cf91a (old id 407351)
- date added to LUP
- 2016-04-01 16:18:26
- date last changed
- 2022-04-07 07:14:40
@article{999254a6-3a9d-4292-9f0f-73c4f90cf91a, abstract = {{Transport measurements are presented on a quantum ring that is tunnel-coupled to a quantum dot. When the dot is in the Coulomb blockade regime, but strongly coupled to the open ring, Fano line shapes are observed in the current through the ring, when the electron number in the dot changes by 1. The symmetry of the Fano resonances is found to depend on the magnetic flux penetrating the area of the ring and on the strength of the ring-dot coupling. At temperatures above T=0.65 K the Fano effect disappears, while the Aharonov-Bohm interference in the ring persists up to T=4.2 K. Good agreement is found between these experimental observations and a single-channel scattering matrix model including decoherence in the dot.}}, author = {{Fuhrer, Andreas and Brusheim, Patrik and Ihn, T and Sigrist, M and Ensslin, K and Wegscheider, W and Bichler, M}}, issn = {{1098-0121}}, language = {{eng}}, number = {{20}}, publisher = {{American Physical Society}}, series = {{Physical Review B (Condensed Matter and Materials Physics)}}, title = {{Fano effect in a quantum-ring-quantum-dot system with tunable coupling}}, url = {{http://dx.doi.org/10.1103/PhysRevB.73.205326}}, doi = {{10.1103/PhysRevB.73.205326}}, volume = {{73}}, year = {{2006}}, }