Ground-state staggered magnetization of two-dimensional quantum Heisenberg antiferromagnets

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The ground-state staggered magnetization of spin-S quantum Heisenberg antiferromagnets may be estimated in spin-wave theory (effectively a 1/S expansion) or by perturbation in J=Jx=Jy away from the Ising (J=0, Jz>0) limit. The latter series in J2 is poorly convergent for the square lattice and a naive summation of the available terms yields overestimates of the staggered magnetization. A new way of analyzing the perturbation series that should remove the slow convergence is proposed. The resulting ground-state staggered magnetization per spin for spin-1/2 is 0.313, while spin-wave theory yields 0.303, in units where the full, classical staggered magnetization is 0.500.

Original languageEnglish (US)
Pages (from-to)2380-2382
Number of pages3
JournalPhysical Review B
Issue number4
StatePublished - 1988
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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