Effect of interfacial coupling on rectification in organic spin rectifiers

doi:10.1088/1674-1056/24/7/077308

中国物理B ›› 2015, Vol. 24 ›› Issue (7): 77308-077308.doi: 10.1088/1674-1056/24/7/077308

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇下一篇

Effect of interfacial coupling on rectification in organic spin rectifiers

胡贵超, 左梦莹, 李营, 张朝, 任俊峰, 王传奎

College of Physics and Electronics, Shandong Normal University, Jinan 250014, China

收稿日期:2014-12-04 修回日期:2015-03-19 出版日期:2015-07-05 发布日期:2015-07-05
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 1374195), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2014AM017), and the Excellent Young Scholars Research Fund of Shandong Normal University, China.

Effect of interfacial coupling on rectification in organic spin rectifiers

Hu Gui-Chao (胡贵超), Zuo Meng-Ying (左梦莹), Li Ying (李营), Zhang Zhao (张朝), Ren Jun-Feng (任俊峰), Wang Chuan-Kui (王传奎)

College of Physics and Electronics, Shandong Normal University, Jinan 250014, China

Received:2014-12-04 Revised:2015-03-19 Online:2015-07-05 Published:2015-07-05
Contact: Hu Gui-Chao E-mail:hgc@sdnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 1374195), the Natural Science Foundation of Shandong Province, China (Grant No. ZR2014AM017), and the Excellent Young Scholars Research Fund of Shandong Normal University, China.

摘要/Abstract

摘要：

The effect of interfacial coupling on rectification in an organic co-oligomer spin diode is investigated theoretically by considering spin-independent and spin-resolved couplings respectively. In the case of spin-independent coupling, an optimal interfacial coupling strength with a significant enhanced rectification ratio is found, whose value depends on the structural asymmetry of the molecule. In the case of spin-resolved coupling, we found that only the variation of the interfacial coupling with specific spin is effective to modulate the rectification, which is due to the spin-filtering property of the central asymmetric magnetic molecule. A transition of the spin-current rectification between parallel spin-current rectification and antiparallel spin-current rectification may be observed with the variation of the spin-resolved interfacial coupling. The interfacial effect on rectification is further analyzed from the spin-dependent transmission spectrum at different biases.

关键词: organic spintronics, organic ferromagnet, rectification, interfacial coupling

Abstract:

Key words: organic spintronics, organic ferromagnet, rectification, interfacial coupling

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

73.63.-b

75.10.Lp (Band and itinerant models) 85.75.-d (Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)

胡贵超, 左梦莹, 李营, 张朝, 任俊峰, 王传奎. Effect of interfacial coupling on rectification in organic spin rectifiers[J]. 中国物理B, 2015, 24(7): 77308-077308.

Hu Gui-Chao (胡贵超), Zuo Meng-Ying (左梦莹), Li Ying (李营), Zhang Zhao (张朝), Ren Jun-Feng (任俊峰), Wang Chuan-Kui (王传奎). Effect of interfacial coupling on rectification in organic spin rectifiers[J]. Chin. Phys. B, 2015, 24(7): 77308-077308.

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Effect of interfacial coupling on rectification in organic spin rectifiers

Effect of interfacial coupling on rectification in organic spin rectifiers

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