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Magnetic Interaction in Insulating Cuprates

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Abstract

We examine two-spin (2S) and cyclic four-spin (4S) magnetic interactions in insulating ladder and two-dimensional (2D) cuprates. By a comparison of eigenstates between d-p and Heisenberg models, we evaluate magnitudes of these interactions. We find that the 4S interaction is ∼10 % of nearest neighboring 2S interaction, and a diagonal 2S interaction is considerably small. The 4S interaction for a ladder cuprate is larger than that for 2D one, and plays an important role in the low-energy excitation. The Heisenberg ladder with the obtained 2S and 4S interactions reproduces very well the experimental result of the temperature dependence of the magnetic susceptibility.

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Authors and Affiliations

  1. Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan

    Yoshiaki Mizuno, Takami Tohyama & Sadamichi Maekawa

Authors
  1. Yoshiaki Mizuno
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  2. Takami Tohyama
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  3. Sadamichi Maekawa
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Mizuno, Y., Tohyama, T. & Maekawa, S. Magnetic Interaction in Insulating Cuprates. Journal of Low Temperature Physics 117, 389–393 (1999). https://doi.org/10.1023/A:1022577918657

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  • DOI: https://doi.org/10.1023/A:1022577918657

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