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A p-spin interaction Ashkin–Teller spin-glass model

Author

Listed:
  • Queiroz Jr, I.S.
  • da Costa, F.A.
  • Nobre, F.D.

Abstract

A p-spin interaction Ashkin–Teller spin glass, with three independent Gaussian probability distributions for the exchange interactions, is studied by means of the replica method. A simple phase diagram is obtained within the replica-symmetric approximation, presenting an instability of the paramagnetic solution at low temperatures. The replica-symmetry-breaking procedure is implemented and a rich phase diagram is obtained; besides the paramagnetic phase, three distinct spin-glass phases appear. Three first-order critical frontiers are found and they all meet at a triple point; among such lines, two of them present discontinuities in the order parameters, but no latent heat, whereas the other one exhibits both discontinuities in the order parameters and a finite latent heat.

Suggested Citation

  • Queiroz Jr, I.S. & da Costa, F.A. & Nobre, F.D., 2002. "A p-spin interaction Ashkin–Teller spin-glass model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 309(1), pages 106-120.
    • Handle: RePEc:eee:phsmap:v:309:y:2002:i:1:p:106-120
    DOI: 10.1016/S0378-4371(02)00581-2
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