Exact Solution of the Biquadratic Spin-1 t-J Model in One Dimension
Statistical Mechanics
2009-10-30 v1
Abstract
A new generalization of the t-J model with a nearest-neigbor hopping is formulated and solved exactly by the Bethe-ansatz method. The model describes the dynamics of spin-S fermions with isotropic or anisotropic interactions. In the case S=1 the magnetic interaction is biquadratic in the spin operators. In contrast to the SU(N) generalization of the t-J model, studied previously in the literature, the present model possesses beyond a massless excitation also a massive one. The physical properties indicate the existence of Cooper-type pairs with finite binding energy.
Cite
@article{arxiv.cond-mat/9706228,
title = {Exact Solution of the Biquadratic Spin-1 t-J Model in One Dimension},
author = {F. C. Alcaraz and R. Z. Bariev},
journal= {arXiv preprint arXiv:cond-mat/9706228},
year = {2009}
}
Comments
11 pages, latex