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Author
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Date
2011-11Type
- Journal Article
Citations
Cited 44 times in
Web of Science
Cited 48 times in
Scopus
ETH Bibliography
yes
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Abstract
Quantum point contacts are fundamental building blocks for mesoscopic transport experiments and play an important role in recent interference and fractional quantum Hall experiments. However, it is unclear how electron–electron interactions and the random disorder potential influence the confinement potential and give rise to phenomena such as the mysterious 0.7 anomaly. Novel growth techniques of AlXGa1−XAs heterostructures for high-mobility two-dimensional electron gases enable us to investigate quantum point contacts with a strongly suppressed disorder potential. These clean quantum point contacts indeed show transport features that are obscured by disorder in standard samples. From these transport data, we are able to extract those parameters of the confinement potential that describe its shape in the longitudinal and transverse directions. Knowing the shape (and hence the slope) of the confinement potential might be crucial for predicting which interaction-induced states can best form in quantum point contacts. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000041848Publication status
publishedExternal links
Journal / series
New Journal of PhysicsVolume
Pages / Article No.
Publisher
Institute of PhysicsOrganisational unit
03439 - Ensslin, Klaus / Ensslin, Klaus
03833 - Wegscheider, Werner / Wegscheider, Werner
08835 - Ihn, Thomas (Tit.-Prof.)
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Show all metadata
Citations
Cited 44 times in
Web of Science
Cited 48 times in
Scopus
ETH Bibliography
yes
Altmetrics