Spin-Wave Description of Haldane-gap antiferromagnets

Details Spin-Wave Description of Haldane-gap antiferromagnets Spin-Wave Description of Haldane-gap antiferromagnets

2002-10-18

arxiv.org/abs/cond-mat/0210399v3

Physics

Condensed Matter

Statistical Mechanics

to be published in J. Phys. Soc. Jpn. Vol. 72, No. 4 (2003)

Scientific paper

10.1143/JPSJ.72.769

Modifying the conventional antiferromagnetic spin-wave theory which is plagued by the difficulty of the zero-field sublattice magnetizations diverging in one dimension, we describe magnetic properties of Haldane-gap antiferromagnets. The modified spin waves, constituting a grand canonical bosonic ensemble so as to recover the sublattice symmetry, not only depict well the ground-state correlations but also give useful information on the finite-temperature properties.

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