中国物理B ›› 2009, Vol. 18 ›› Issue (5): 2048-2053.doi: 10.1088/1674-1056/18/5/053
陈莉1, 王宙斐2
Wang Zhou-Fei(王宙斐)a)† and Chen Li(陈莉)b)
摘要: We use the Monte Carlo method to study an antiferromagnetical Ising spin system on a centred honeycomb lattice, which is composed of two kinds of 1/2 spin particles A and B. There exist two different bond energies JA-A and JA-B in this lattice. Our study is focused on how the ratio of JA-B to JA-A influences the critical behaviour of this system by analysing the physical quantities, such as the energy, the order parameter, the specific heat, susceptibility, {etc} each as a function of temperature for a given ratio of JA-B to JA-A. Using these results together with the finite-size scaling method, we obtain a phase diagram for the ratio JA-B / JA-A. This work is helpful for studying the phase transition problem of crystals composed of compounds.
中图分类号: (Classical spin models)