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Spin-polarized electric current in silicene nanoribbons induced by atomic adsorption

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Núñez, C. and Orellana, P. A. and Rosales, L. and Römer, R. A. and Domínguez-Adame Acosta, Francisco (2017) Spin-polarized electric current in silicene nanoribbons induced by atomic adsorption. Physical review B, 96 (4). ISSN 2469-9950

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Official URL: http://dx.doi.org/10.1103/PhysRevB.96.045403


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Abstract

We investigate the nonequilibrium transport properties of a silicene armchair nanoribbon with a random distribution of adsorbed atoms in apex positions. A ferromagnetic insulator grown below the nanoribbon splits spin-up and spin-down electron bands and gives rise to a spin polarization of the conductance. The conductance vanishes when the Fermi energy matches the adatom levels due to the coupling of adatom localized states with the continuum spectra of the nanoribbon. This is the well-known Fano effect, resulting in a spin-dependent antiresonance in the conductance. The different antiresonance energies of spin-up and spin-down electrons give rise to a full spin polarization of the conductance in a broad energy window. This spin-dependent Fano effect opens the possibility to using it in spintronics as a tuneable source of polarized electrons.


Item Type:Article
Additional Information:

©2017 American Physical Society.
C.N. and F.D.-A. thank the Theoretical Physics Group of the University of Warwick for the warm hospitality. Work at Madrid has been supported by MINECO under Grants No. MAT2013-46308 and No. MAT2016-75955. L.R. and P.A.O. acknowledge FONDECYT Grants No. 1140388 and No. 1140571, respectively. C.N. is grateful for the funding of scholarship CONICYT-Chile and DGIP-UTFSM. UK research data statement: All data accompanying this publication are directly available within the publication.

Uncontrolled Keywords:Graphene
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:44596
Deposited On:06 Oct 2017 14:30
Last Modified:09 Oct 2017 07:59

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