Quasiparticle tunneling in the lowest Landau level

Hennel, Szymon and Scheidegger, Patrick and Kellermeier, Max and Hofmann, Andrea and Kr`ahenmann, Tobias and Reichl, Christian and Wegscheider, Werner and Ihn, Thomas and Ensslin, Klaus. (2018) Quasiparticle tunneling in the lowest Landau level. Physical Review B, 97 (24). p. 245305.

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Official URL: https://edoc.unibas.ch/85264/

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We measure quasiparticle tunneling across a constriction in the first Landau level. In the limit of weak backscattering, the dependence of the tunneling conductance on temperature and dc-bias is in qualitative disagreement with existing theories. For stronger backscattering, data obtained in the v = 1/3 state can be fitted to weak backscattering theory with the predicted effective fractional charge of e(*) = e/3. The scaling parameter g is however not universal and depends strongly on the gate voltage applied to the constriction. At v = 4/3, a more complex picture emerges. We propose an interpretation in terms of selective tunneling between the multiple modes present at the edge.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimental Quantum Computing with Semiconductors (Hofmann)
UniBasel Contributors:Hofmann, Andrea
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:28 Jan 2022 08:32
Deposited On:28 Jan 2022 08:32

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