Tunable Kondo physics in a carbon nanotube double quantum dot.

Journal article

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.

Authors: Chorley, S; Galpin, MR; Jayatilaka, F; Smith, C; Logan, D

• Publication status: Published
• Journal: Physical Review Letters
• Volume: 109
• Issue: 15
• Pages: 156804
• Publication date: 2012-10-01
• DOI: 10.1103/physrevlett.109.156804
• EISSN: 1079-7114
• ISSN: 0031-9007
• Language: English
• Keywords: cond-mat.str-el; cond-mat.mes-hall