Ruderman-Kittel-Kasuya-Yosida and magnetic-field interactions in coupled Kondo quantum dots.
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)].
Simon
Pascal
P
Laboratoire de Physique et Modélisation des Milieux Condensés, CNRS and UJF, 38042 Grenoble, France.
López
Rosa
R
Oreg
Yuval
Y