A new generalization of the t-J model with a nearest-neigbour hopping is formulated and solved exactly by the Bethe-ansatz method in the thermodymanic limit. The model describes the dymanics of fermions with different spins and with isotropic and anisotropic interactions.
@article{arxiv.cond-mat/9706301,
title = {New Integrable Generalization of the One-Dimensional t-J Model},
author = {F. C. Alcaraz and R. Z. Bariev},
journal= {arXiv preprint arXiv:cond-mat/9706301},
year = {2008}
}