Two-point correlation function of the 2D Ising model with impurity lattice bonds
Виктор Степанович Доценко, Vl.S. Dotsenko
The two-point correlation function of the 2D Ising model with small concentration of impurity bonds ( nu imp <<1) is found to change its critical behaviour from ( sigma r sigma 0 ) approximately 1/R 1/4 for r<<R nu exp(c 1 / nu imp ) to ( sigma R delta 0 ) approximately exp<or=-(c 2 / nu imp )(ln ln R) 2 ) for R>>R, which implies the change of the critical index from 1 / 4 in the pure Ising model to 0 in the model with impurities.
Journal of Physics C Solid State Physics•Jun 20, 1982•20 citations