Journal
PHYSICS LETTERS A
Volume 380, Issue 5-6, Pages 730-738Publisher
ELSEVIER
DOI: 10.1016/j.physleta.2015.10.050
Keywords
Zigzag graphene nanoribbons; Hydrogenation; Oxidation; Hetero-structure; Spin filtering effect
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Using the non-equilibrium Green's function method and the spin-polarized density functional theory, we investigate the magnetism and spin resolved transport properties of hetero-structures based on zigzag graphene nanoribbons (ZGNRs) with edge hydrogenation (H) and oxidation (O). It is found that a perfect spin filtering effect can be realized on O-ZGNR-H/H-ZGNR-H in both parallel and anti-parallel spin configurations. Interestingly, an excellent dual spin filtering behavior can be obtained on O-ZGNR-H/H2-ZGNR-H, which is independent of the width of the nanoribbon. Our results indicate that the hetero-structure holds promise for spintronic devices in future. (c) 2015 Elsevier B.V. All rights reserved.
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