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Low-temperature series expansions for the square lattice Ising model with spin S > 1

Journal of Physics A: Mathematical and General, ISSN: 0305-4470, Vol: 29, Issue: 14, Page: 3805-3815
1996
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  • Citations
    18
    • Citation Indexes
      18
  • Captures
    1

Article Description

We derive low-temperature series (in the variable u = exp[-βJ/S]) for the spontaneous magnetization, susceptibility, and specific heat of the spin-S Ising model on the square lattice for S = 3/2, 2, 5/2, and 3. We determine the location of the physical critical point and non-physical singularities. The number of non-physical singularities closer to the origin than the physical critical point grows quite rapidly with S. The critical exponents at the singularities which are closest to the origin and for which we have reasonably accurate estimates are independent of S. Due to the many non-physical singularities, the estimates for the physical critical point and exponents are poor for higher values of S, though consistent with universality. © 1996 IOP Publishing Ltd.

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