We show the integrability of spin-½ XXZ Heisenberg chain with two arbitrary spin boundary impurities. By using the fusion method, we generalize it to the spin-1 XXZ chain. Then the eigenvalues of Hamiltonians of these models are obtained by the means of Bethe ansatz method.

arXiv:cond-mat/9910384Journal of Physics A Mathematical and GeneralOct 21, 19992 citations

arXiv:cond-mat/9402083 · Nuclear Physics B

On the parafermionic scattering of an integrable Heisenberg model with impurity

Marcio Jose Martins

Published Sep 1, 1994• 6 citations

arXiv HTML PDF

DOI: 10.1016/0550-3213(94)90025-6

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{T}^{1/2}

for all values of the impurity spin S. For antiferromagnetic coupling and T=0 the impurity susceptibility diverges proportionally to \ensuremath{\Vert}lnH\ensuremath{\Vert} as H\ensuremath{\rightarrow}0 if S=(1/2, while if S>1 the impurity spin is only partially compensated for by the S=1 chain.