Phys. Rev. Lett. 97, 096603 (2006) [4 pages]Zero-Field Kondo Splitting and Quantum-Critical Transition in Double Quantum DotsReceived 7 March 2006; revised 17 May 2006; published 30 August 2006 Double quantum dots offer unique possibilities for the study of many-body correlations. A system containing one Kondo dot and one effectively noninteracting dot maps onto a single-impurity Anderson model with a structured (nonconstant) density of states. Numerical renormalization-group calculations show that, while band filtering through the resonant dot splits the Kondo resonance, the singlet ground state is robust. The system can also be continuously tuned to create a pseudogapped density of states and access a quantum-critical point separating Kondo and non-Kondo phases. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.096603
DOI:
10.1103/PhysRevLett.97.096603
PACS:
72.15.Qm, 73.23.−b, 73.63.Kv
See AlsoComment: L. Vaugier, A. A. Aligia, and A. M. Lobos, Comment on “Zero-field Kondo Splitting and Quantum-Critical Transition in Double Quantum Dots”, Phys. Rev. Lett. 99, 209701 (2007). Reply: Luis G. Dias da Silva, Nancy P. Sandler, Kevin Ingersent, and Sergio E. Ulloa, Dias da Silva et al. Reply:, Phys. Rev. Lett. 99, 209702 (2007). |
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