Hidden Kondo Effect in a Correlated Electron Chain
Strongly Correlated Electrons
2009-10-31 v1
Abstract
We develop a general Bethe Ansatz formalism for diagonalizing an integrable model of a magnetic impurity of arbitrary spin coupled ferro- or antiferromagnetically to a chain of interacting electrons. The method is applied to an open chain, with the exact solution revealing a ``hidden'' Kondo effect driven by forward electron scattering off the impurity. We argue that the so-called ``operator reflection matrices'' proposed in recent Bethe Ansatz studies of related models emulate only forward electron-impurity scattering which may explain the absence of complete Kondo screening for certain values of the impurity-electron coupling in these models.
Cite
@article{arxiv.cond-mat/9809093,
title = {Hidden Kondo Effect in a Correlated Electron Chain},
author = {A. A. Zvyagin and H. Johannesson},
journal= {arXiv preprint arXiv:cond-mat/9809093},
year = {2009}
}
Comments
5 pages, RevTex; to appear in Phys. Rev. Lett