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Singularity of Specific Heat in the Second Order Phase Transition

1967
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Progress of theoretical physics
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On the basis of Fisher's method, singularity of specific heat near the transition point is studied for the Ising or Heisenberg model with an arbitrary value of spin and range of interaction. The following results are obtained for a reasonable distribution of zeros of canonical partition function. (a) If the specific heat has a singularity C,_ (T --Tc) -a above the transition point Tc, it should have a singularity C_ (Tc-T) -a below Tc, C_ being not necessarily equal to C+. (b) If the specific

doi:10.1143/ptp.38.322
fatcat:q6zcwsxf45csngn4ivciw3vkmu