The Two-impurity Anderson Model Revisited: Competition between Kondo Effect and Reservoir-mediated Superexchange in Double Quantum Dots
Mesoscale and Nanoscale Physics
2011-03-31 v1 Other Condensed Matter
Abstract
We study a series-coupled double quantum dot in the Kondo regime modeled by the two-impurity Anderson model and find a new conduction-band mediated superexchange interaction that competes with Kondo physics in the strong Coulomb interaction limit. Our numerical renormalization group results, complemented with the higher-order Rayleigh-Schr\"odinger perturbation theory, show that the novel exchange mechanism leads to clear experimental consequences that can be checked in transport measurements through double quantum dots.
Keywords
Cite
@article{arxiv.0911.0959,
title = {The Two-impurity Anderson Model Revisited: Competition between Kondo Effect and Reservoir-mediated Superexchange in Double Quantum Dots},
author = {Minchul Lee and Mahn-Soo Choi and Rosa Lopez and Ramon Aguado and Jan Martinek and Rok Zitko},
journal= {arXiv preprint arXiv:0911.0959},
year = {2011}
}