Tunable Kondo physics in a carbon nanotube double quantum dot

Tunable Kondo physics in a carbon nanotube double quantum dot

Phys. Rev. Lett. 109, 156804 (2012) We investigate a tunable two-impurity Kondo system in a strongly correlated carbon nanotube double quantum dot, accessing the full range of charge regimes. In the regime where both dots contain an unpaired electron, the system approaches the two-impurity Kondo mod...

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Bibliographic Details
Main Authors: Chorley, S. J, Galpin, M. R, Jayatilaka, F. W, Smith, C. G, Logan, D. E, Buitelaar, M. R
Format: Journal Article
Language:English
Published: 17-09-2012
Subjects:
Physics - Mesoscale and Nanoscale Physics
Physics - Strongly Correlated Electrons
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Summary:Phys. Rev. Lett. 109, 156804 (2012) We investigate a tunable two-impurity Kondo system in a strongly correlated carbon nanotube double quantum dot, accessing the full range of charge regimes. In the regime where both dots contain an unpaired electron, the system approaches the two-impurity Kondo model. At zero magnetic field the interdot coupling disrupts the Kondo physics and a local singlet state arises, but we are able to tune the crossover to a Kondo screened phase by application of a magnetic field. All results show good agreement with a numerical renormalization group study of the device.
DOI:10.48550/arxiv.1209.3735