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Spin-current diode with a ferromagnetic semiconductor

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arxiv 1502.03599 v1 pith:Z5ZYA4RR submitted 2015-02-12 cond-mat.mes-hall

Spin-current diode with a ferromagnetic semiconductor

classification cond-mat.mes-hall
keywords diodedeviceleadspin-currentcurrentferromagneticbiaselectronics
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Diode is a key device in electronics: the charge current can flow through the device under a forward bias, while almost no current flows under a reverse bias. Here we propose a corresponding device in spintronics: the spin-current diode, in which the forward spin current is large but the reversed one is negligible. We show that the lead/ferromagnetic quantum dot/lead system and the lead/ferromagnetic semiconductor/lead junction can work as spin-current diodes. The spin-current diode, a low dissipation device, may have important applications in spintronics, as the conventional charge-current diode does in electronics.

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