Ruderman-Kittel-Kasuya-Yosida and magnetic-field interactions in coupled Kondo quantum dots.
Ruderman-Kittel-Kasuya-Yosida and magnetic-field interactions in coupled Kondo quantum dots.
复制标题
DOI：
10.1103/physrevlett.94.086602
复制
发表时间：
2004-04
影响因子：
8.6
通讯作者：
P. Simon;Rosa López;Y. Oreg
中科院分区：
文献类型：
--
作者：
P. Simon;Rosa López;Y. Oreg
我们从理论上研究了两个独立的人工近藤杂质的输运性质。它们通过可调的Ruderman-Kittel-Kasuya-Yosida（RKKY）相互作用耦合在一起。对于足够强的反铁磁RKKY相互作用，杂质态密度随外加面内磁场的增加而增加。这种效应可以用来区分反铁磁和铁磁RKKY相互作用。这些结果可能与解释克雷格等人[科学304，565（2004）]最近实验的某些特征有关。
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)].