Quantum Hall Effect in Graphene with Superconducting Electrodes

Rickhaus, P. and Weiss, M. and Marot, L. and Schonenberger, C.. (2012) Quantum Hall Effect in Graphene with Superconducting Electrodes. Nano Letters, Vol. 12, H. 4. pp. 1942-1945.

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Official URL: http://edoc.unibas.ch/dok/A6070306

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We have realized an integer quantum Hall system with superconducting contacts by connecting graphene to niobium electrodes. Below their upper critical field of 4 T, an integer quantum Hall effect coexists with superconductivity in the leads but with a plateau conductance that is larger than in the normal state. We ascribe this enhanced quantum Hall plateau conductance to Andreev processes at the graphene-superconductor interlace leading to the formation of so-called Andreev edge-states. The enhancement depends strongly on the filling-factor and is less pronounced on the first plateau monolayer graphene.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian and Rickhaus, Peter and Weiss, Markus and Marot, Laurent
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Chemical Society
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:13 Oct 2017 07:33
Deposited On:01 Mar 2013 11:13

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