Hidden Integrability of a Kondo Impurity in an Unconventional Host

Details Hidden Integrability of a Kondo Impurity in an Unconventional Host Hidden Integrability of a Kondo Impurity in an Unconventional Host

1998-12-05

arxiv.org/abs/cond-mat/9812086v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, RevTex

Scientific paper

10.1016/S0375-9601(98)00952-9

We study a spin-1/2 Kondo impurity coupled to an unconventional host in which
the density of band states vanishes either precisely at (``gapless'' systems)
or on some interval around the Fermi level (``gapped''systems). Despite an
essentially nonlinear band dispersion, the system is proven to exhibit hidden
integrability and is diagonalized exactly by the Bethe ansatz.

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