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Integrable Impurity Spin Ladder Systems

Tonel, A; Foerster, Angela; Guan, Xi-Wen; Links, Jon


Two different types of integrable impurities in a spin ladder system are proposed. The impurities are introduced in such a way that the integrability of the models is not violated. The models are solved exactly with the Bethe ansatz equations as well as the energy eigenvalues obtained. We show for both models that a phase transition between gapped and gapless spin excitations occurs at a critical value of the rung coupling J. In addition, the dependence of the impurities on this phase...[Show more]

CollectionsANU Research Publications
Date published: 2003
Type: Journal article
Source: Journal of Physics A: Mathematical and General
DOI: 10.1088/0305-4470/36/2/305


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