铁磁物质中有杂质势时束缚磁极化子产生的讨论  

Discussion on the production of bound magnetic polaron in ferromagnetic material with impurity potential

作　　者：刘涛[1] 黄书文[1] 范云霞[1] 汪克林[1] 

机构地区：[1]西南科技大学理学院,四川绵阳621010

出　　处：《中国科学技术大学学报》2006年第7期747-754,共8页JUSTC

基　　金：四川省教育厅基金(041139)资助

摘　　要：对铁磁物质中束缚极化子的存在与介质中有无杂质势密切相关的规律进行了系统的变分计算.在变分计算前,用Schwinger的角动量谐振子理论将其变换为载流子与两类玻色子耦合的问题,计算后得到的结论与普遍的看法一致.计算结果给出了杂质势的强弱对束缚极化子形成的影响、半宽度的变化规律和用有限格点数的晶体代替实际晶体作近似计算的条件.A systematic vaniational calculation performed to find the behavior of the existence of boun, polaron related with the impunity potential. Before the variational calculation the theory of oscillo momentrem suggested by Schwinger was applied to transform it into a problem of the coupling to transform charge carrior and two types of Boson. The results obtained by calculation show good agreement with the general view points in other works. The relation between the existence of polaron, the chang of the half-width of polaron and the strength of the impurity potential were also given.

关 键 词：束缚极化子 杂质势 模拟退火 铁磁物质 

分 类 号：O471.3[理学—半导体物理]