title: High-performance solution of the transport problem in a graphene armchair structure with a generic potential.
abstract: We propose an efficient numerical method to study the transport properties of armchair graphene ribbons in the presence of a generic external potential. The method is based on a continuum envelope-function description with physical boundary conditions. The envelope functions are computed in the reciprocal space, and the transmission is then obtained with a recursive scattering matrix approach. This allows a significant reduction of the computational time with respect to finite difference simulations.
authors.affiliation: Dipartimento di Ingegneria dell'Informazione, Università di Pisa, Via Caruso 16, I-56122 Pisa, Italy.
authors.forename: Demetrio
authors.initials: D
authors.lastname: Logoteta
authors.affiliation: Dipartimento di Ingegneria dell'Informazione, Università di Pisa, Via Caruso 16, I-56122 Pisa, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Marconcini
authors.affiliation: Dipartimento di Fisica, Università di Pisa and INFN, Largo Pontecorvo 3, I-56127 Pisa, Italy.
authors.forename: Claudio
authors.initials: C
authors.lastname: Bonati
authors.affiliation: Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford OX1 3NP, United Kingdom.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Fagotti
authors.affiliation: Dipartimento di Ingegneria dell'Informazione, Università di Pisa, Via Caruso 16, I-56122 Pisa, Italy.
authors.forename: Massimo
authors.initials: M
authors.lastname: Macucci
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D004574:Electromagnetic Fields; D006108:Graphite / Q000737:chemistry*; D008956:Models, Chemical; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure*; D012542:Scattering, Radiation
chemical_list: D006108:Graphite