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

doi:10.1088/1674-1056/20/7/077306

摘要/Abstract

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.

Abstract: 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.

Key words: organic spintronics, rectification, co-oligomer, proportion

中图分类号: (Electronic transport in nanoscale materials and structures)

73.63.-b

75.47.-m (Magnetotransport phenomena; materials for magnetotransport) 85.75.-d (Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)

胡贵超, 王辉, 任俊峰. Effect of proportion on rectification in organic co-oligomer spin rectifiers[J]. 中国物理B, 2011, 20(7): 77306-077306.

Hu Gui-Chao(胡贵超), Wang Hui(王辉), and Ren Jun-Feng(任俊峰). Effect of proportion on rectification in organic co-oligomer spin rectifiers[J]. Chin. Phys. B, 2011, 20(7): 77306-077306.

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