Effect of proportion on rectification in organic co-oligomer spin rectifiers  

作　　者：胡贵超 王辉 任俊峰 

机构地区：[1]College of Physics and Electronics,Shandong Normal University

出　　处：《Chinese Physics B》2011年第7期410-415,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant Nos.10904084 and 10904083);the MiddleAged and Young Scientists Research Awards Foundation of Shandong Province of China (Grant No.2009BS01009);the Science and Technology Foundation for Institution of Higher Education of Shandong Province of China (Grant No.J09LA03);the Postdoctoral Science Foundation of China

摘　　要：The rectification behaviours in organic magnetic/nonmagnetic co-oligomer spin rectifiers are investigated theoretically. It is found that both the charge current and the spin current through the device are rectified at the same time. By adjusting the proportion between the magnetic and nonmagnetic components, the threshold voltage and the rectification ratio of the rectifier are modulated. A large rectification ratio is obtained when the two components are equal in length. The intrinsic mechanism is analysed in terms of the asymmetric localization of molecular orbitals under biases. The effect of molecular length on the rectification is also discussed. These results will be helpful in the future design of organic spin diodes.The rectification behaviours in organic magnetic/nonmagnetic co-oligomer spin rectifiers are investigated theoretically. It is found that both the charge current and the spin current through the device are rectified at the same time. By adjusting the proportion between the magnetic and nonmagnetic components, the threshold voltage and the rectification ratio of the rectifier are modulated. A large rectification ratio is obtained when the two components are equal in length. The intrinsic mechanism is analysed in terms of the asymmetric localization of molecular orbitals under biases. The effect of molecular length on the rectification is also discussed. These results will be helpful in the future design of organic spin diodes.

关 键 词：organic spintronics RECTIFICATION co-oligomer PROPORTION 

分 类 号：TN35[电子电信—物理电子学] TM461[电气工程—电器]