M. Karbach et Kh. Mutter, THE ANTIFERROMAGNETIC SPIN-1 2-XXZ MODEL ON RINGS WITH AN ODD NUMBER OF SITES/, Journal of physics. A, mathematical and general, 28(16), 1995, pp. 4469-4479
The ground-state energies of the antiferromagnetic XXZ model at a give
n spin are determined on chains with an odd number N of sites. Analyti
cal and numerical solutions of the Bethe ansatz equations are compared
for the N-even and N-odd case. The scaling properties of the ground-s
tate energies enable the determination of the zero-temperature suscept
ibility. For the isotropic case, we analyse the logarithmic terms in t
he low-field limit.