自旋注入有机物的扩散理论  

Diffusion theory of spin injection into organic polymers

作　　者：任俊峰[1] 付吉永[1] 刘德胜[1] 解士杰[1] 

机构地区：[1]山东大学物理与微电子学院晶体材料国家重点实验室,济南250100

出　　处：《物理学报》2004年第11期3814-3817,共4页Acta Physica Sinica

基　　金：国家自然科学基金 (批准号 :90 10 3 0 3 4和 10 0 740 40 )资助的课题~~

摘　　要：根据自旋注入半导体的相关理论 ,考虑到有机体内可能同时含有带自旋的单极化子和不带自旋的双极化子两种载流子 ,从扩散理论和欧姆定律出发 ,建立了自旋注入有机体的唯象模型 .通过计算发现 ,适当选择铁磁层极化率或两层的电导率可以使得有机层内电流具有高的自旋极化 .Based on the theory of electrical spin injection into semiconductors, by considering the carriers of spin polarons and spinless bipolarons in organic polymers, we suggested a model of spin injection into organic polymers. It was found that a high current polarization can be obtained by adjusting the spin current polarization in the ferromagnetic layer or the conductivities of the ferromagnetic and organic layers. Effect of the proportion of polarons to carriers on the spin current polarization was discussed.

关 键 词：自旋注入 双极化子 扩散理论 自旋极化 极化率 铁磁层 载流子 注入电流 半导体 单极化 

分 类 号：O469[理学—凝聚态物理]