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Full characterization of a carbon nanotube parallel double quantum dot

Abulizi, Gulibusitan and Baumgartner, Andreas and Schönenberger, Christian. (2016) Full characterization of a carbon nanotube parallel double quantum dot. physica status solidi (b), 253 (12). pp. 2428-2432.

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Official URL: http://edoc.unibas.ch/52353/

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Abstract

We have measured the differential conductance of a parallel carbon nanotube (CNT) double quantum dot (DQD) with strong inter-dot capacitance and inter-dot tunnel coupling. Nominally, the device consists of a single CNT with two contacts. However, we identify two sets of Coulomb blockade (CB) diamonds that do not block transport individually, which suggest that two quantum dots (QDs) are contacted in parallel. We find strong and periodic anti-crossings in the gate and bias dependence, which are only possible if the QDs have similar characteristics. We discuss qualitatively the level spectrum and the involved transport processes in this device and extract the DQD coupling parameters. These results lead us to believe that clean and undoped QDs are formed parallel to the CNT axis, possibly on the outer and inner shells of a multi-wall CNT, or in a double-stranded CNT bundle.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Experimentalphysik Nanoelektronik (Schönenberger)
UniBasel Contributors:Schönenberger, Christian and Baumgartner, Andreas and Abulizi, Gulibusitan
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:Wiley
ISSN:0370-1972
e-ISSN:1521-3951
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:15 Feb 2017 09:12
Deposited On:15 Feb 2017 09:12

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