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- Title
SPIN-POLARIZATION-DEPENDENT TRANSPORT IN GRAPHENE NANORIBBON WITH A VACANCY.
- Authors
LIU, CHUN-MEI; LIU, NIAN-HUA; LIU, ZHENG-FANG; AN, LI-PING
- Abstract
By using the first-principles density functional theory combining with the nonequilibrium Green's function techniques, we investigate the electronic structure and the spin-polarization-dependent electronic transport of zigzag graphene nanoribbons (ZGNR) with a defect of vacancy. The total energy of the graphene ribbons corresponding to different vacancy locations is calculated to analyze the stability of the structures. It is found that the existence of a vacancy causes a significant change in the electronic band gap. The electronic band and the transport become spin-polarization-dependent. The calculated I-V characteristic shows that the spin-polarization-dependent effect can be enhanced under a finite bias voltage.
- Subjects
POLARIZATION (Nuclear physics); GRAPHENE; NANOSTRUCTURED materials; DENSITY functionals; GREEN'S functions; ELECTRONIC structure; ELECTRIC potential; POINT defects
- Publication
International Journal of Nanoscience, 2011, Vol 10, Issue 3, p533
- ISSN
0219-581X
- Publication type
Article
- DOI
10.1142/S0219581X11008307