Abstract
A finite-cell-scaling analysis of the spin-1 antiferromagnetic Heisenberg-Ising chain, shows that the ground-state properties are completely different than in the spin-½ case. Between the gapless phase and the doublet ground-state Néel phase, it appears, in an extended range of the anisotropy () a characteristic Heisenberg-phase with a nonmagnetic singlet ground state, nonzero gap, and exponential decay of the correlation functions.
- Received 15 July 1982
DOI:https://doi.org/10.1103/PhysRevB.27.613
©1983 American Physical Society