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Doping induced spin filtering effect in zigzag graphene nanoribbons with asymmetric edge hydrogenation

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3 Author(s)
Kang, Jun ; State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, People's Republic of China ; Wu, Fengmin ; Li, Jingbo

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The magnetic and spin dependent transport properties of asymmetrically hydrogenated zigzag graphene nanoribbons, which are C–H2 bonded at one edge while C–H bonded at the other, are investigated from first-principles calculations. Due to their special distributions of the density of states near Fermi level, a perfect (100%) spin filtering effect can be achieved in such graphene nanoribbons through p-type or n-type doping. Moreover, a negative differential resistance effect is observed in both doping case, which results from the reducing of conductance near Fermi level with increasing bias voltage.

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Applied Physics Letters  (Volume:98 ,  Issue: 8 )