Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2008-03-07
Physics
Condensed Matter
Strongly Correlated Electrons
final version to appear in Phys. Rev. B
Scientific paper
10.1103/PhysRevB.77.235103
We study the two-impurity Anderson model on finite chains using numerical techniques. We discuss the departure of magnetic correlations as a function of the interimpurity distance from a pure 2k_F oscillation due to open boundary conditions. We observe qualitatively different behaviors in the interimpurity spin correlations and in transport properties at different values of the impurity couplings. We relate these different behaviors to a change in the relative dominance between the Kondo effect and the Ruderman-Kittel-Kasuya-Yoshida (RKKY) interaction. We also observe that when RKKY dominates there is a definite relation between interimpurity magnetic correlations and transport properties. In this case, there is a recovery of 2k_F periodicity when the on-site Coulomb repulsion on the chain is increased at quarter-filling. The present results could be relevant for electronic nanodevices implementing a non-local control between two quantum dots that could be located at variable distance along a wire.
Costamagna S.
Riera José A.
No associations
LandOfFree
Numerical study of finite size effects in the one-dimensional two-impurity Anderson model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Numerical study of finite size effects in the one-dimensional two-impurity Anderson model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Numerical study of finite size effects in the one-dimensional two-impurity Anderson model will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-252851