Edge contact dependent spin transport for n-type doping zigzag-graphene with asymmetric edge hydrogenation

Spin transport features of the n-type doping zigzag graphene nanoribbons (ZGNRs) with an edge contact are investigated by first principle methods, where ZGNRs are C–H 2 bonded at one edge while C–H bonded at the other to form an asymmetric edge hydrogenation. The results show that a perfect spin fil...

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Published in:Scientific reports 2014-02, Vol.4 (1), p.4038-4038, Article 4038
Main Authors: Deng, Xiaoqing, Zhang, Zhenhua, Tang, Guiping, Fan, Zhiqiang, Zhu, Huali, Yang, Changhu
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639/766/1130/2798
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Humanities and Social Sciences
Hydrogenation
Magnetism
multidisciplinary
Science
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description Spin transport features of the n-type doping zigzag graphene nanoribbons (ZGNRs) with an edge contact are investigated by first principle methods, where ZGNRs are C–H 2 bonded at one edge while C–H bonded at the other to form an asymmetric edge hydrogenation. The results show that a perfect spin filtering effect (100%) in such ZGNR nanojunctions can be achieved in a very large bias region for the unchanged spin states regardless of bias polarities and the nanojunction with a contact of two C–H 2 bonded edges has larger spin polarized current than that with a contact of two C–H bonded edges. The transmission pathways and the projected density of states (PDOS) demonstrate that the edge of C-H 2 bonds play a crucial role for the spin magnetism and spin-dependent transport properties. Moreover, the negative differential resistance (NDR) effect is also observed in the spin-polarized current.
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subjects 119/118
639/766/1130/2798
639/925/927/1062
Humanities and Social Sciences
Hydrogenation
Magnetism
multidisciplinary
Science
title Edge contact dependent spin transport for n-type doping zigzag-graphene with asymmetric edge hydrogenation
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