自旋为1的Easy-plane Heisenberg模型中的新方法

A NEW METHOD FOR EASY-PLANE SPIN-ONE HEISENBERG MODEL

引入一种新的变换方法(特征角自旋算子变换)探讨了自旋为1的Easy-plane Heisenberg铁磁体的自旋波行为,计算了体系的基态能量,自发磁化强度和元激发谱,并与其他方法和数值计算结果作了比较.

We introduce a new method (the characteristic angle spin operator transformation method) to discuss the spin-waves in easy-plane spin-one Heinsenberg ferroma-gnet(h=-J sum from (i,j)Si· Si+ Dsum from i (six)2-hsum from i six) The ground state energy E0, themagnetization M and the magnon dispersion relation ek are calculated analytically, and the contrast with other methods and numerical results have been given.