反铁磁Ising自旋S=1三角格子上的基态研究  

A STUDY OF THE GROUND STATE OF ANTIFERROMAGNE-TIC ISING SPIN S=1 MODEL ON TRIANGULAR LATTICE

作　　者：王养璞 徐国良[1] 

机构地区：[1]苏州大学物理系

出　　处：《低温物理学报》1990年第3期166-173,共8页Low Temperature Physical Letters

摘　　要：本文采用文献[1]中提出的费米变换方法,研究了与三态点阵气体模型等价的三角点阵上的近邻相互作用的具有五个参数的最一般的 S=1 lsing 反铁磁体,严格地求得了它的基态能量和丰富而复杂的零温相图.同时还利用四相点方程,将 k,l 平面分成25个小区域,它们分别对应于各个拓扑不等价的基态相图.Using the Fermi transformation method presented in reference [1],we have studied the most general nearest-neighbor S=1 Ising antiferromagnet with five interaction parameters on triangular lattice,which is equal in value to the three-state lattice-gas model.We have,to the great extent,obtained the ground state energy and the rich and complicated OK phase diagrams.With the four-phase-point equations,the k,l phases have been divided into 25 regions that correspond to the topologically distinct ground-state diagrams.

关 键 词：反铁磁体 基态 ISING模型 零温 

分 类 号：O513[理学—低温物理]