Spin-Wave Theory and Finite-Size Scaling for the Heisenberg Antiferromagnet

Details Spin-Wave Theory and Finite-Size Scaling for the Heisenberg Antiferromagnet Spin-Wave Theory and Finite-Size Scaling for the Heisenberg Antiferromagnet

1992-12-14

arxiv.org/abs/cond-mat/9212020v1

Physics

Condensed Matter

19 pages(3 figures not included), RevTeX 2.0, Submitted to Phys. Rev B (BV4570)

Scientific paper

10.1103/PhysRevB.47.7961

Spin-wave perturbation theory for the Heisenberg antiferromagnet at zero temperature is used to compute the finite-lattice corrections to the ground state energy, the staggered magnetization and the energy gap. The dispersion relation, the spin-wave velocity and the bulk ground state energy to order $O(1/S^2)$ are also computed for the square lattice. The results agree very well with the predictions of Neuberger and Ziman and Fisher.

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