Multichannel Kondo Screening in a One-Dimensional Correlated Electron System
Strongly Correlated Electrons
2009-10-30 v2
Abstract
We present the exact Bethe Ansatz solution of a multichannel model of one- dimensional correlated electrons coupled antiferromagnetically to a magnetic impurity of arbitrary spin S. The solution reveals that interactions in the bulk make the magnetic impurity drive both spin and charge fluctuations, producing a mixed valence at the impurity site, with an associated effective spin S_eff > S in the presence of a magnetic field. The screening of the impurity spin is controlled by its size independently of the number of channels, in contrast to the multichannel Kondo effect for free electrons.
Cite
@article{arxiv.cond-mat/9705048,
title = {Multichannel Kondo Screening in a One-Dimensional Correlated Electron System},
author = {A. A. Zvyagin and H. Johannesson and M. Granath},
journal= {arXiv preprint arXiv:cond-mat/9705048},
year = {2009}
}
Comments
5 pages Revtex. Final revised version to appear in Europhys. Lett