Investigation Si(100) surface using 2-dimensional ising model

In this study, critical behaviour of Si(100) surface is intestigated by using cooling algorithm which is improved from Creutz Cellular Automaton based on Ising Model. The simulation are carried on rectangular lattice with linear dimensions Lx=30, 60, 90, 120 and Ly=Lx, 2Lx,?.,10Lx using periodic boundary conditions. The investigations showed that maximum Lx/Ly proportion due to dimer-dimer anisotropic interactions must be 1/7 to obtain ordered phase. Furthermore, in order to get compatible surface reconstructions with STM results at high tempratures, spin average must be seperated with ?seperation proportion?, ?. Infinite lattice critical temperatures corresponding to different parameter sets are obtained and compared with experimental and theoretical results. Finally, we show that variation of diagonal interaction parameter is effective on critical behaviour.