Efficient spin filter and spin valve in a single-molecule magnet Fe4 between two graphene electrodes

We propose a magnetic molecular junction consisting of a single-molecule magnet Fe4 connected two graphene electrodes and investigate transport properties, using the nonequilibrium Green's function method in combination with spin-polarized density-functional theory. The results show that the de...

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Veröffentlicht in:Applied physics letters 2015-12, Vol.107 (25)
Hauptverfasser: Zu, Feng-Xia, Gao, Guo-Ying, Fu, Hua-Hua, Xiong, Lun, Zhu, Si-Cong, Peng, Li, Yao, Kai-Lun
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Sprache:eng
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Zusammenfassung:We propose a magnetic molecular junction consisting of a single-molecule magnet Fe4 connected two graphene electrodes and investigate transport properties, using the nonequilibrium Green's function method in combination with spin-polarized density-functional theory. The results show that the device can be used as a nearly perfect spin filter with efficiency approaching 100%. Our calculations provide crucial microscopic information how the four iron cores of the chemical structure are responsible for the spin-resolved transmissions. Moreover, it is also found that the device behaves as a highly efficient spin valve, which is an excellent candidate for spintronics of molecular devices. The idea of combining single-molecule magnets with graphene provides a direction in designing a new class of molecular spintronic devices.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4938469