Hidden Kondo Effect in a Correlated Electron Chain

Details Hidden Kondo Effect in a Correlated Electron Chain Hidden Kondo Effect in a Correlated Electron Chain

1998-09-04

arxiv.org/abs/cond-mat/9809093v1

Phys. Rev. Lett. 81, 2751 (1998)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, RevTex; to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.81.2751

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.

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