title: Ruderman-Kittel-Kasuya-Yosida and magnetic-field interactions in coupled Kondo quantum dots.
abstract: We investigate theoretically the transport properties of two independent artificial Kondo impurities. They are coupled together via a tunable Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction. For strong enough antiferromagnetic RKKY interaction, the impurity density of states increases with the applied in-plane magnetic-field. This effect can be used to distinguish between antiferromagnetic and ferromagnetic RKKY interactions. These results may be relevant to explain some features of recent experiments by Craig et al. [Science 304, 565 (2004)].
authors.affiliation: Laboratoire de Physique et Modélisation des Milieux Condensés, CNRS and UJF, 38042 Grenoble, France.
authors.forename: Pascal
authors.initials: P
authors.lastname: Simon
authors.forename: Rosa
authors.initials: R
authors.lastname: López
authors.forename: Yuval
authors.initials: Y
authors.lastname: Oreg