Critical behaviour of the 2D Ising model with impurity bonds
Виктор Степанович Доценко, Vl.S. Dotsenko
The critical behaviour of the specific heat for the 2D Ising model with impurity bonds is found exactly by the method of Feynman's wanderings over a 2D lattice. In the critical region the model is equivalent to the spinar model with interaction-a zero-component Gross-Neveu model. The specific heat behaves like C approximately ln ln 1/ mod tau mod , as compared with C approximately -ln mod tau mod for the pure model. The slope of the phase transition curve T c ( nu ) near zero concentration of impurity bonds ( nu =0) is also found.
Journal of Physics C Solid State Physics•Jan 30, 1982•66 citations