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Magnetic order and spin excitations in layered Heisenberg antiferromagnets with compass-model anisotropies

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Abstract

The spin-wave excitation spectrum, magnetization, and Néel temperature for the quasi-two-dimensional spin-1/2 antiferromagnetic Heisenberg model with the compass-model interaction in the plane proposed for iridates are calculated in the random phase approximation. The spin-wave spectrum agrees well with data of Lanczos diagonalization. We find that the Néel temperature is enhanced by the compass-model interaction and is close to the experimental value for Ba2IrO4.

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Authors and Affiliations

  1. Joint Institute for Nuclear Research, Dubna, Moscow region, 141980, Russia

    A. A. Vladimirov & N. M. Plakida

  2. Institut für Theoretische Physik, Universität Leipzig, D-04109, Leipzig, Germany

    D. Ihle

Authors
  1. A. A. Vladimirov
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  2. D. Ihle
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  3. N. M. Plakida
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Correspondence to N. M. Plakida.

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Vladimirov, A.A., Ihle, D. & Plakida, N.M. Magnetic order and spin excitations in layered Heisenberg antiferromagnets with compass-model anisotropies. Jetp Lett. 100, 780–785 (2015). https://doi.org/10.1134/S0021364014240163

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  • DOI: https://doi.org/10.1134/S0021364014240163

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