Spin-excited states and rectification in an organic spin rectifier

doi:10.1088/1674-1056/23/8/087306

中国物理B ›› 2014, Vol. 23 ›› Issue (8): 87306-087306.doi: 10.1088/1674-1056/23/8/087306

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

Spin-excited states and rectification in an organic spin rectifier

左梦莹, 胡贵超, 李营, 任俊峰, 王传奎

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

收稿日期:2014-03-22 修回日期:2014-04-28 出版日期:2014-08-15 发布日期:2014-08-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10904084, 10904083, and 11374195) and the Excellent Young Scholars Research Fund of Shandong Normal University.

Spin-excited states and rectification in an organic spin rectifier

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

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

Received:2014-03-22 Revised:2014-04-28 Online:2014-08-15 Published:2014-08-15
Contact: Hu Gui-Chao E-mail:hgc@sdnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10904084, 10904083, and 11374195) and the Excellent Young Scholars Research Fund of Shandong Normal University.

摘要/Abstract

摘要： Spin-excited states in an asymmetric magnetic organic co-oligomer diode are investigated theoretically. The results demonstrate that the structural asymmetry of the co-oligomer is modulated by the spin-excited states, which is embodied in the wave functions of the eigenstates as well as the spin density wave. By calculating the transport property, a robust spin-current rectification concomitant with a charge-current rectification is observed in all spin-excited states. However, the current through the diode is suppressed distinctly by the spin-excited states, while the rectification ratios may be reduced or enhanced depending on the bias and the excited spins. The intrinsic mechanism is analyzed from the spin-dependent transmission combined with the change of molecular eigenstates under bias. Finally, the temperature-induced spin excitation is simulated. Significant rectification behavior is obtained even at room temperature.

关键词: organic spintronics, organic ferromagnet, rectification, spin-excited state

Abstract: Spin-excited states in an asymmetric magnetic organic co-oligomer diode are investigated theoretically. The results demonstrate that the structural asymmetry of the co-oligomer is modulated by the spin-excited states, which is embodied in the wave functions of the eigenstates as well as the spin density wave. By calculating the transport property, a robust spin-current rectification concomitant with a charge-current rectification is observed in all spin-excited states. However, the current through the diode is suppressed distinctly by the spin-excited states, while the rectification ratios may be reduced or enhanced depending on the bias and the excited spins. The intrinsic mechanism is analyzed from the spin-dependent transmission combined with the change of molecular eigenstates under bias. Finally, the temperature-induced spin excitation is simulated. Significant rectification behavior is obtained even at room temperature.

Key words: organic spintronics, organic ferromagnet, rectification, spin-excited state

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)

左梦莹, 胡贵超, 李营, 任俊峰, 王传奎. Spin-excited states and rectification in an organic spin rectifier[J]. 中国物理B, 2014, 23(8): 87306-087306.

Zuo Meng-Ying (左梦莹), Hu Gui-Chao (胡贵超), Li Ying (李营), Ren Jun-Feng (任俊峰), Wang Chuan-Kui (王传奎). Spin-excited states and rectification in an organic spin rectifier[J]. Chin. Phys. B, 2014, 23(8): 87306-087306.

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Spin-excited states and rectification in an organic spin rectifier

Spin-excited states and rectification in an organic spin rectifier

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