We 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.
@article{arxiv.0711.2610,
title = {Transport properties of graphene nanoribbon heterostructures},
author = {L. Rosales and P. Orellana and Z. Barticevic and M. Pacheco},
journal= {arXiv preprint arXiv:0711.2610},
year = {2007}
}
Comments
3 pages, 4 figures. To appear in Microelectronic Journal