2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/142299We study the electronic and transport properties of heterostructures formed by armchair graphene nanoribbons with intersections of finite length. We describe the system by a tight-binding model and calculate the density of states and the conductance within the Green's function formalism based on real-space renormalization techniques. We show the apparition of interface states and bound states in the continuum which present a strong dependence of the heterostructure geometry. We investigate the effects on the conductance of an external perturbation applied on the edges atoms of the intersection region.3 pages, 4 figures. To appear in Microelectronic JournalMesoscale and Nanoscale Physicstext