2004/11/05 by Miriam del Valle, C. Tejedor, Carlos Tejedor +1
Materials Science · Physics and Astronomy · #Carbon Nanotubes in Composites #Graphene research and applications #Semiconductor materials and interfaces #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.71.125306
published as Physical Review B 71, 125306 (2005) · 8 pages, 8 figures
arxiv created 2004/11/05 · openalex publication_date 2005/03/11 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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%.