Hidden Integrability of a Kondo Impurity in an Unconventional Host

Valery I. Rupasov

doi:10.1016/s0375-9601(98)00952-9

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Hidden Integrability of a Kondo Impurity in an Unconventional Host

Valery I. Rupasov

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Abstract

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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Valery I. Rupasov. 1998-12-05. Hidden Integrability of a Kondo Impurity in an Unconventional Host. https://doi.org/10.1016/s0375-9601(98)00952-9

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