Spin-excited states and rectification in an organic spin rectifier

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

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.

Keywords: organic spintronics organic ferromagnet rectification spin-excited state

Received: 22 March 2014
Revised: 28 April 2014
Accepted manuscript online:

PACS:	73.63.-b	(Electronic transport in nanoscale materials and structures)
	75.10.Lp	(Band and itinerant models)
	85.75.-d	(Magnetoelectronics; spintronics: devices exploiting spin polarized transport or integrated magnetic fields)

Fund: 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.

Corresponding Authors: Hu Gui-Chao
E-mail: hgc@sdnu.edu.cn

Cite this article:

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 2014 Chin. Phys. B 23 087306

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Spin-excited states and rectification in an organic spin rectifier

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