Physics – Condensed Matter – Statistical Mechanics
Scientific paper
1997-02-13
Z. Physik B, 101, 441 (1996)
Physics
Condensed Matter
Statistical Mechanics
Latex, 18 pages plus 7 figures (postscript)
Scientific paper
The ground-state properties of the S=1 Haldane-Shastry model are studied using a modified Lanczos algorithm and diagonalizing exactly small chains. We find evidence that, as for the antiferromagnetic Heisenberg model, the spectrum shows a gap, in contrast to the S=1/2 case. The correlation functions decay exponentially for large m. We find that the correlation functions for the Haldane-Shastry model decay faster than for the Heisenberg model. We estimate the infinite system limit for the ground-state energy, value of the gap and correlation functions.
Sacramento Pedro D.
Vieira Vitor Rocha
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