Ising自旋(s=1/2)反铁磁超晶格低温热力学  

THEMODYNAMICS FOR ISING SPIN (S=1/2) SYSTEM ON A SUPERLATTICE WITH ANTIFERROMAGNETIC INTERACTION AT LOWER TEMPERATURE

作　　者：王选章[1] 

机构地区：[1]哈尔滨师范大学物理系

出　　处：《低温物理学报》1989年第3期179-186,共8页Low Temperature Physical Letters

摘　　要：利用费米子变换方法,将 Ising 自旋(S=1/2)反铁磁超晶格体系变换为粒子数不守恒的费米子体系.再利用量子统计微扰方法,在二级微扰近似下对周期为L=L_a+L_b(L_a=L_b)的 Ising 自旋(S=1/2)反铁磁超晶格进行了计算,求得了这种超晶格体系的自由能等一些热力学量和温度(T)、周期 L 的关系式.By using a Fermion-transformation method,Ising spin (s=1/2) system on a superlattice with antiferromagnetic interaction is transformed into a fermion system with the total number of particles unconserved.Applying second-order p:rturbation method in quantum statistical theory,we calculate the themodynamic founction of Ising spin (s=1/2)system on the superlattice with.antifexromagnetic interaction and the period (L=La+Lb,La=Lb),and obtain the relations between the superlattice period and some themodynamic founctions at lower temperature.

关 键 词：热力学 反铁磁 超晶格 超导体 

分 类 号：TM265.014[一般工业技术—材料科学与工程]