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Spin waves in the isotropic heisenberg antiferromagnet above the Néel point

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Zeitschrift für Physik

Abstract

Spin waves in an isotropic antiferromagnet are described using a decoupling scheme for the Green's functions in the paramagnetic region. The results are interpreted with an ansatz for the scattering function suggested by Halperin and Hohenberg and show overdamping in a hydrodynamic region and damped propagating spin waves in a region of short wavelengths. Expressions for the dynamical susceptibilities and the Néel temperature are derived.

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Authors and Affiliations

  1. Institut für Theoretische Physik, Universität Gießen, Gießen

    A. Bunde & W. Biem

Authors
  1. A. Bunde
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  2. W. Biem
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Additional information

(D 26). This work contains parts of the dissertation of A. Bunde.

We acknowledge the valuable discussions with Proffs. H. Wagner and F. Wegner, KFA Jülich.

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Bunde, A., Biem, W. Spin waves in the isotropic heisenberg antiferromagnet above the Néel point. Z. Physik 269, 65–71 (1974). https://doi.org/10.1007/BF01668870

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  • DOI: https://doi.org/10.1007/BF01668870

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