Nature of crossover from classical to Ising-like critical behavior
  We present an accurate numerical determination of the crossover from classical to Ising-like critical behavior upon approach of the critical point in three-dimensional systems. The possibility to vary the Ginzburg number in our simulations allows us to cover the entire crossover region. We employ these results to scrutinize several semi-phenomenological crossover scaling functions that are widely used for the analysis of experimental results. In addition we present strong evidence that the exponent relations do not hold between effective exponents. 
Erik Luijten (1,2) and Kurt Binder (2) ((1) Max-Planck-Institute for   Polymer Research Mainz (2) Johannes Gutenberg-Univers...