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Perturbation theory for the triangular Heisenberg antiferromagnet with Ising-like anisotropy

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Zeitschrift für Physik B Condensed Matter

Abstract

It has been argued that the case of strong uniaxial anisotropy is especially favourable for the formation of a spin-liquid state in theS=1/2 triangular Heisenberg antiferromagnet [77]. We reconsider the old arguments using up-to-date numerical techniques, and extend the study to general values ofS. Recent progress in the understanding of this frustrated quantum spin system sheds light on the question why the original arguments in favour of an RVB state can not be conclusive. Our present results indicate that the tendency towards three-sublattice ordering is much stronger than it had been thought. However, the caseS=1/2 is still seen to be set apart from the casesS>1/2, and forS=1/2 the existence of true longrange order in the ground state remains debatable.

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Author notes

  1. P. Fazekas

    Present address: Central Research Institute for Physics, Budapest, Hungary

Authors and Affiliations

  1. Institut für Theoretische Physik, Universität zu Köln, Zülpicher Strasse 77, W-5000, Köln 41, Federal Republic of Germany

    B. Kleine, P. Fazekas & E. Müller-Hartmann

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  1. B. Kleine
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  2. P. Fazekas
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  3. E. Müller-Hartmann
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Kleine, B., Fazekas, P. & Müller-Hartmann, E. Perturbation theory for the triangular Heisenberg antiferromagnet with Ising-like anisotropy. Z. Physik B - Condensed Matter 86, 405–410 (1992). https://doi.org/10.1007/BF01323734

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  • DOI: https://doi.org/10.1007/BF01323734

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