Figure 4

Comparison of the finite size numerical results and the mean field theory. (a) The order parameter, \(M_{x}\), as a function of the reduced dimensionless temperature, \(k_{B}T/NJ\) for different sizes of the spin systems. The black-short-dashed line is for \(N=100\), the blue-long-dashed line is for \(N=500\) and the red-solid line is the mean field prediction. (b) The specific heat plot in the same style as in (a).