Monte Carlo study of the antiferromagnetical Ising model on a centred honeycomb lattice  

作　　者：王宙斐 陈莉 

机构地区：[1]College of Science,South China Agriculture University [2]College of Physics,Northeast Normal University

出　　处：《Chinese Physics B》2009年第5期2048-2053,共6页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No 10571091);the National Science and Technology Supporting Program of China(Grant No 2006BAD11A07)

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.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.

关 键 词：centred honeycomb lattice antiferromagnetical Ising model phase transition MonteCarlo method 

分 类 号：O469[理学—凝聚态物理]