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Abstract: We investigate the transmission of electrons between conducting nanoribbonleads oriented at multiples of 60 degrees with respect to one another,connected either directly or through graphene polygons. A mode-matchinganalysis suggests that the transmission at low-energies is sensitive to theprecise way in which the ribbons are joined. Most strikingly, we find thatarmchair leads forming 120-degree angles can support either a largetransmission or a highly suppressed transmission, depending on the specificgeometry. Tight-binding calculations demonstrate the effects in detail, and arealso used to study transmission at higher energies as well as for zigzag ribbonleads.



Author: A. Iyengar, T. Luo, H.A. Fertig, L. Brey

Source: https://arxiv.org/



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