Zero-field Kondo splitting and quantum-critical transition in double quantum dots
Mesoscale and Nanoscale Physics
2009-01-23 v1 Strongly Correlated Electrons
Abstract
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.
Cite
@article{arxiv.cond-mat/0608087,
title = {Zero-field Kondo splitting and quantum-critical transition in double quantum dots},
author = {Luis Dias da Silva and Nancy Sandler and Kevin Ingersent and Sergio Ulloa},
journal= {arXiv preprint arXiv:cond-mat/0608087},
year = {2009}
}
Comments
4 pages, 4 figures; Accepted for publication in Physical Review Letters