“School of Nano-Sciences”
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| Paper IPM / Nano-Sciences / 14924 |
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In this paper, we investigate the influence of point structural defects on the transport properties of zigzag
graphene nanoribbons (ZGNRs) under uniaxial strain field, using the numerical studies based on the ab-initio
calculation, the standard tight-binding model and Green's functions. The calculation results show that the
direction of applied strain and defect type significantly affect the conductance properties of ZGNRs. The
conductance of the defective nanoribbons generally decreases and some dips corresponding to complete
electron backscattering is appeared. This behavior is originated from the different coupling between the
conducting electronic states influenced by the wave function modification around the Fermi energy which
depends on the defect type. We show that the presence of defects leads to a significant increase in local current.
Furthermore, we have investigated the strain-tunable spin transport of defective ZGNRs in the presence of the
exchange magnetic field and Rashba spin-orbit coupling (RSOC).
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