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Phase transitions of the bilayered spin-S Heisenberg model

Kwai-Kong Ng, Fu Chun Zhang, and Michael Ma
Phys. Rev. B 53, 12196 – Published 1 May 1996
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Abstract

We study the ground state and the phase transitions of the bilayered spin-S antiferromagnetic Heisenberg model using the Schwinger boson mean-field theory. The interplane coupling initially stabilizes but eventually destroys the long-range antiferromagnetic order. The transition to the disordered state is continuous for small S, and first order for large S. The latter is consistent with an argument based on spin-wave theory. © 1996 The American Physical Society.

  • Received 17 January 1996

DOI:https://doi.org/10.1103/PhysRevB.53.12196

©1996 American Physical Society

Authors & Affiliations

Kwai-Kong Ng

  • Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221

Fu Chun Zhang

  • Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221
  • Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

Michael Ma

  • Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221
  • Department of Physics, Chinese University of Hong Kong, Satin, New Territories, Hong Kong

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Vol. 53, Iss. 18 — 1 May 1996

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