Renormalization-group study of high-spin Heisenberg antiferromagnets
- 1 December 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 36 (16) , 8600-8606
- https://doi.org/10.1103/physrevb.36.8600
Abstract
An even-site block renormalization-group method is applied to the spin-1 and spin-(3/2 anisotropic or alternating Heisenberg antiferromagnets. In the spin-1 case it shows an energy gap Δ ≃0.368 166 and ground-state energy /NJ≃1.449 724, which are in good agreement with the recent Monte Carlo results. In the spin-(3/2 case it shows an energy excitation behavior similar to that in the spin-(1/2 case. Therefore, our study tends to support Haldane’s conjecture. In addition, a possible novel property of the spin-1 Heisenberg antiferromagnet has been predicted.
Keywords
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