Physical review. B, Solid state
Tests of strong scaling in the three-dimensional Ising model
Michael Ellis Fisher, Howard B. Tarko
Abstract
We study numerically the amplitudes ${E}^{\ifmmode\pm\else\textpm\fi{}}(\stackrel{\ensuremath{\rightarrow}}{\mathrm{R}})$ of the ${|\frac{\ensuremath{\Delta}T}{{T}_{c}}|}^{1\ensuremath{-}\ensuremath{\alpha}}$ variation in the spin-spin correlation functions $〈{s}_{\stackrel{\ensuremath{\rightarrow}}{0}}{s}_{\stackrel{\ensuremath{\rightarrow}}{\mathrm{R}}}〉$, of three-dimensional Ising models in zero field above and below ${T}_{c}$. By allowing for reasonable correction terms to the asymptotic behavior ${E}^{\ifmmode\pm\else\textpm\fi{}}(\stackrel{\ensuremath{\rightarrow}}{\mathrm{R}})\ensuremath{\approx}{E}_{0}^{\ifmmode\pm\else\textpm\fi{}}{(\frac{R}{a})}^{\ensuremath{\zeta}}$, where $a$ is the lattice spacing, we find consistency with the strong-scaling prediction $\ensuremath{\zeta}=\frac{(1\ensuremath{-}\ensuremath{\alpha})}{\ensuremath{\nu}}\ensuremath{-}d+2\ensuremath{-}\ensuremath{\eta}\ensuremath{\simeq}0.31$, and reasonable agreement with universality and $\ensuremath{\epsilon}$-expansion estimates of the amplitudes ${E}_{0}^{\ifmmode\pm\else\textpm\fi{}}$.