Defective transport properties of three-terminal carbon nanotube junctions
Physical Review B 71, 125306 (2005).
M. Del Valle, C. Tejedor, and G. Cuniberti.
Journal DOI: https://doi.org/10.1103/PhysRevB.71.125306

We investigate the transport properties of three-terminal carbon-based nanojunctions within the scattering matrix approach. The stability of such junctions is subordinated to the presence of nonhexagonal arrangements in the molecular network. Such ``defective'' arrangements do influence the resulting quantum transport observables, as a consequence of the possibility of acting as pinning centers of the corresponding wave function. By investigating a fairly wide class of junctions we have found regular mutual dependences between such localized states at the carbon network and a striking behavior of the conductance. In particular, we have shown that Fano resonances emerge as a natural result of the interference between defective states and the extended continuum background. As a consequence, the currents through the junctions hitting these resonant states might experience variations on a relevant scale with current modulations of up to 75%.


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Defective transport properties of three-terminal carbon nanotube junctions
Physical Review B 71, 125306 (2005).
M. Del Valle, C. Tejedor, and G. Cuniberti.
Journal DOI: https://doi.org/10.1103/PhysRevB.71.125306

We investigate the transport properties of three-terminal carbon-based nanojunctions within the scattering matrix approach. The stability of such junctions is subordinated to the presence of nonhexagonal arrangements in the molecular network. Such ``defective'' arrangements do influence the resulting quantum transport observables, as a consequence of the possibility of acting as pinning centers of the corresponding wave function. By investigating a fairly wide class of junctions we have found regular mutual dependences between such localized states at the carbon network and a striking behavior of the conductance. In particular, we have shown that Fano resonances emerge as a natural result of the interference between defective states and the extended continuum background. As a consequence, the currents through the junctions hitting these resonant states might experience variations on a relevant scale with current modulations of up to 75%.


Cover
©10.1103/PhysRevB.71.125306
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Involved Scientists