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Quantum antiferromagnetism in 2 dimensions

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Zeitschrift für Physik B Condensed Matter

Abstract

We study the spin dynamics of the 2-dimensional spin 1/2 Heisenberg model at finite temperatureT, in particular the frequency region ω<T≪J (the coupling constant). The main conclusion reached is that the spin fluctuations have relaxational character, no propagating spin waves exist for ω<T. Comparison with experimental results on La2CuO4 give good agreement. Similarities and differences to previous theoretical treatments are discussed.

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Authors and Affiliations

  1. Institut für Theoretische Physik, RWTH Aachen, Templergraben 55, W-5100, Aachen, Federal Republic of Germany

    H. Capellmann & J. Lötfering

  2. Institute Laue Langevin, 156X, F-38042, Grenoble Cedex, France

    O. Schärpf

Authors
  1. H. Capellmann
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  2. J. Lötfering
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  3. O. Schärpf
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Capellmann, H., Lötfering, J. & Schärpf, O. Quantum antiferromagnetism in 2 dimensions. Z. Physik B - Condensed Matter 88, 181–187 (1992). https://doi.org/10.1007/BF01323570

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  • DOI: https://doi.org/10.1007/BF01323570

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