Strong spin-dependent negative differential resistance in composite graphene superlattices



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Munarriz, J. and Gaul, C. and Malyshev, Andrey and Orellana, P. A. and Mueller, C. A. and Domínguez-Adame Acosta, Francisco (2013) Strong spin-dependent negative differential resistance in composite graphene superlattices. Physical Review B, 88 (15). ISSN 0163-1829

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We find clear signatures of spin-dependent negative differential resistance in compound systems comprising a graphene nanoribbon and a set of ferromagnetic insulator strips deposited on top of it. The periodic array of ferromagnetic strips induces a proximity exchange splitting of the electronic states in graphene, resulting in the appearance of a superlattice with a spin-dependent energy spectrum. The electric current through the device can be highly polarized and both the current and its polarization manifest nonmonotonic dependence on the bias voltage. The device operates therefore as an Esaki spin diode, which opens possibilities to design new spintronic circuits.

Item Type:Article
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© 2013 American Physical Society.
Work in Madrid was supported by the MICINN (Project No. MAT2010-17180). Research of C.G. was supported by the PICATA postdoctoral fellowship from the Moncloa Campus of International Excellence (UCM-UPM). P.A.O. acknowledges financial support from the FONDECYT (Grant No. 1100560).

Uncontrolled Keywords:Transport, Devices
Subjects:Sciences > Physics > Materials
ID Code:27162
Deposited On:23 Oct 2014 08:53
Last Modified:12 Feb 2018 18:51

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