title: Tunable Kondo physics in a carbon nanotube double quantum dot.
abstract: 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.affiliation: Cavendish Laboratory, University of Cambridge, Cambridge, United Kingdom.
authors.forename: S J
authors.initials: SJ
authors.lastname: Chorley
authors.forename: M R
authors.initials: MR
authors.lastname: Galpin
authors.forename: F W
authors.initials: FW
authors.lastname: Jayatilaka
authors.forename: C G
authors.initials: CG
authors.lastname: Smith
authors.forename: D E
authors.initials: DE
authors.lastname: Logan
authors.forename: M R
authors.initials: MR
authors.lastname: Buitelaar